diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3738603cf..02ef43a37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to
 
 ## Added
 
+- ✨(backend) add ancestors links definitions to document abilities #846
 - 🚩(backend) add feature flag for the footer #841
 - 🔧(backend) add view to manage footer json #841
 - ✨(frontend) add custom css style #771
@@ -23,6 +24,7 @@ and this project adheres to
 
 ## Fixed
 
+- 🐛(backend) fix link definition select options linked to ancestors #846
 - 🐛(back) validate document content in serializer #822
 - 🐛(frontend) fix selection click past end of content #840
 
diff --git a/src/backend/core/api/serializers.py b/src/backend/core/api/serializers.py
index e86288bb3..b0772412b 100644
--- a/src/backend/core/api/serializers.py
+++ b/src/backend/core/api/serializers.py
@@ -97,7 +97,7 @@ def validate(self, attrs):
 
             if not self.Meta.model.objects.filter(  # pylint: disable=no-member
                 Q(user=user) | Q(team__in=user.teams),
-                role__in=[models.RoleChoices.OWNER, models.RoleChoices.ADMIN],
+                role__in=models.PRIVILEGED_ROLES,
                 **{self.Meta.resource_field_name: resource_id},  # pylint: disable=no-member
             ).exists():
                 raise exceptions.PermissionDenied(
@@ -124,6 +124,10 @@ def validate(self, attrs):
 class DocumentAccessSerializer(BaseAccessSerializer):
     """Serialize document accesses."""
 
+    document_id = serializers.PrimaryKeyRelatedField(
+        read_only=True,
+        source="document",
+    )
     user_id = serializers.PrimaryKeyRelatedField(
         queryset=models.User.objects.all(),
         write_only=True,
@@ -136,11 +140,11 @@ class DocumentAccessSerializer(BaseAccessSerializer):
     class Meta:
         model = models.DocumentAccess
         resource_field_name = "document"
-        fields = ["id", "user", "user_id", "team", "role", "abilities"]
-        read_only_fields = ["id", "abilities"]
+        fields = ["id", "document_id", "user", "user_id", "team", "role", "abilities"]
+        read_only_fields = ["id", "document_id", "abilities"]
 
 
-class DocumentAccessLightSerializer(DocumentAccessSerializer):
+class DocumentAccessLightSerializer(BaseAccessSerializer):
     """Serialize document accesses with limited fields."""
 
     user = UserLightSerializer(read_only=True)
diff --git a/src/backend/core/api/viewsets.py b/src/backend/core/api/viewsets.py
index 9f8a12557..8225cce6f 100644
--- a/src/backend/core/api/viewsets.py
+++ b/src/backend/core/api/viewsets.py
@@ -7,7 +7,6 @@
 
 from django.conf import settings
 from django.contrib.postgres.aggregates import ArrayAgg
-from django.contrib.postgres.fields import ArrayField
 from django.contrib.postgres.search import TrigramSimilarity
 from django.core.exceptions import ValidationError
 from django.core.files.storage import default_storage
@@ -219,14 +218,10 @@ def get_me(self, request):
 class ResourceAccessViewsetMixin:
     """Mixin with methods common to all access viewsets."""
 
-    def get_permissions(self):
-        """User only needs to be authenticated to list resource accesses"""
-        if self.action == "list":
-            permission_classes = [permissions.IsAuthenticated]
-        else:
-            return super().get_permissions()
-
-        return [permission() for permission in permission_classes]
+    def filter_queryset(self, queryset):
+        """Override to filter on related resource."""
+        queryset = super().filter_queryset(queryset)
+        return queryset.filter(**{self.resource_field_name: self.kwargs["resource_id"]})
 
     def get_serializer_context(self):
         """Extra context provided to the serializer class."""
@@ -234,43 +229,6 @@ def get_serializer_context(self):
         context["resource_id"] = self.kwargs["resource_id"]
         return context
 
-    def get_queryset(self):
-        """Return the queryset according to the action."""
-        queryset = super().get_queryset()
-        queryset = queryset.filter(
-            **{self.resource_field_name: self.kwargs["resource_id"]}
-        )
-
-        if self.action == "list":
-            user = self.request.user
-            teams = user.teams
-            user_roles_query = (
-                queryset.filter(
-                    db.Q(user=user) | db.Q(team__in=teams),
-                    **{self.resource_field_name: self.kwargs["resource_id"]},
-                )
-                .values(self.resource_field_name)
-                .annotate(roles_array=ArrayAgg("role"))
-                .values("roles_array")
-            )
-
-            # Limit to resource access instances related to a resource THAT also has
-            # a resource access
-            # instance for the logged-in user (we don't want to list only the resource
-            # access instances pointing to the logged-in user)
-            queryset = (
-                queryset.filter(
-                    db.Q(**{f"{self.resource_field_name}__accesses__user": user})
-                    | db.Q(
-                        **{f"{self.resource_field_name}__accesses__team__in": teams}
-                    ),
-                    **{self.resource_field_name: self.kwargs["resource_id"]},
-                )
-                .annotate(user_roles=db.Subquery(user_roles_query))
-                .distinct()
-            )
-        return queryset
-
     def destroy(self, request, *args, **kwargs):
         """Forbid deleting the last owner access"""
         instance = self.get_object()
@@ -441,44 +399,6 @@ class DocumentViewSet(
     trashbin_serializer_class = serializers.ListDocumentSerializer
     tree_serializer_class = serializers.ListDocumentSerializer
 
-    def annotate_is_favorite(self, queryset):
-        """
-        Annotate document queryset with the favorite status for the current user.
-        """
-        user = self.request.user
-
-        if user.is_authenticated:
-            favorite_exists_subquery = models.DocumentFavorite.objects.filter(
-                document_id=db.OuterRef("pk"), user=user
-            )
-            return queryset.annotate(is_favorite=db.Exists(favorite_exists_subquery))
-
-        return queryset.annotate(is_favorite=db.Value(False))
-
-    def annotate_user_roles(self, queryset):
-        """
-        Annotate document queryset with the roles of the current user
-        on the document or its ancestors.
-        """
-        user = self.request.user
-        output_field = ArrayField(base_field=db.CharField())
-
-        if user.is_authenticated:
-            user_roles_subquery = models.DocumentAccess.objects.filter(
-                db.Q(user=user) | db.Q(team__in=user.teams),
-                document__path=Left(db.OuterRef("path"), Length("document__path")),
-            ).values_list("role", flat=True)
-
-            return queryset.annotate(
-                user_roles=db.Func(
-                    user_roles_subquery, function="ARRAY", output_field=output_field
-                )
-            )
-
-        return queryset.annotate(
-            user_roles=db.Value([], output_field=output_field),
-        )
-
     def get_queryset(self):
         """Get queryset performing all annotation and filtering on the document tree structure."""
         user = self.request.user
@@ -514,8 +434,9 @@ def get_queryset(self):
     def filter_queryset(self, queryset):
         """Override to apply annotations to generic views."""
         queryset = super().filter_queryset(queryset)
-        queryset = self.annotate_is_favorite(queryset)
-        queryset = self.annotate_user_roles(queryset)
+        user = self.request.user
+        queryset = queryset.annotate_is_favorite(user)
+        queryset = queryset.annotate_user_roles(user)
         return queryset
 
     def get_response_for_queryset(self, queryset):
@@ -539,9 +460,10 @@ def list(self, request, *args, **kwargs):
         Additional annotations (e.g., `is_highest_ancestor_for_user`, favorite status) are
         applied before ordering and returning the response.
         """
-        queryset = (
-            self.get_queryset()
-        )  # Not calling filter_queryset. We do our own cooking.
+        user = self.request.user
+
+        # Not calling filter_queryset. We do our own cooking.
+        queryset = self.get_queryset()
 
         filterset = ListDocumentFilter(
             self.request.GET, queryset=queryset, request=self.request
@@ -554,7 +476,7 @@ def list(self, request, *args, **kwargs):
         for field in ["is_creator_me", "title"]:
             queryset = filterset.filters[field].filter(queryset, filter_data[field])
 
-        queryset = self.annotate_user_roles(queryset)
+        queryset = queryset.annotate_user_roles(user)
 
         # Among the results, we may have documents that are ancestors/descendants
         # of each other. In this case we want to keep only the highest ancestors.
@@ -571,7 +493,7 @@ def list(self, request, *args, **kwargs):
         )
 
         # Annotate favorite status and filter if applicable as late as possible
-        queryset = self.annotate_is_favorite(queryset)
+        queryset = queryset.annotate_is_favorite(user)
         queryset = filterset.filters["is_favorite"].filter(
             queryset, filter_data["is_favorite"]
         )
@@ -654,7 +576,7 @@ def trashbin(self, request, *args, **kwargs):
             deleted_at__isnull=False,
             deleted_at__gte=models.get_trashbin_cutoff(),
         )
-        queryset = self.annotate_user_roles(queryset)
+        queryset = queryset.annotate_user_roles(self.request.user)
         queryset = queryset.filter(user_roles__contains=[models.RoleChoices.OWNER])
 
         return self.get_response_for_queryset(queryset)
@@ -834,6 +756,8 @@ def tree(self, request, pk, *args, **kwargs):
         List ancestors tree above the document.
         What we need to display is the tree structure opened for the current document.
         """
+        user = self.request.user
+
         try:
             current_document = self.queryset.only("depth", "path").get(pk=pk)
         except models.Document.DoesNotExist as excpt:
@@ -888,8 +812,8 @@ def tree(self, request, pk, *args, **kwargs):
                 output_field=db.BooleanField(),
             )
         )
-        queryset = self.annotate_user_roles(queryset)
-        queryset = self.annotate_is_favorite(queryset)
+        queryset = queryset.annotate_user_roles(user)
+        queryset = queryset.annotate_is_favorite(user)
 
         # Pass ancestors' links definitions to the serializer as a context variable
         # in order to allow saving time while computing abilities on the instance
@@ -1373,7 +1297,11 @@ def cors_proxy(self, request, *args, **kwargs):
 
 class DocumentAccessViewSet(
     ResourceAccessViewsetMixin,
-    viewsets.ModelViewSet,
+    drf.mixins.CreateModelMixin,
+    drf.mixins.RetrieveModelMixin,
+    drf.mixins.UpdateModelMixin,
+    drf.mixins.DestroyModelMixin,
+    viewsets.GenericViewSet,
 ):
     """
     API ViewSet for all interactions with document accesses.
@@ -1400,37 +1328,52 @@ class DocumentAccessViewSet(
     """
 
     lookup_field = "pk"
-    pagination_class = Pagination
     permission_classes = [permissions.IsAuthenticated, permissions.AccessPermission]
     queryset = models.DocumentAccess.objects.select_related("user").all()
     resource_field_name = "document"
     serializer_class = serializers.DocumentAccessSerializer
-    is_current_user_owner_or_admin = False
 
-    def get_queryset(self):
-        """Return the queryset according to the action."""
-        queryset = super().get_queryset()
+    def list(self, request, *args, **kwargs):
+        """Return accesses for the current document with filters and annotations."""
+        user = self.request.user
 
-        if self.action == "list":
-            try:
-                document = models.Document.objects.get(pk=self.kwargs["resource_id"])
-            except models.Document.DoesNotExist:
-                return queryset.none()
+        try:
+            document = models.Document.objects.get(pk=self.kwargs["resource_id"])
+        except models.Document.DoesNotExist:
+            return drf.response.Response([])
 
-            roles = set(document.get_roles(self.request.user))
-            is_owner_or_admin = bool(roles.intersection(set(models.PRIVILEGED_ROLES)))
-            self.is_current_user_owner_or_admin = is_owner_or_admin
-            if not is_owner_or_admin:
-                # Return only the document owner access
-                queryset = queryset.filter(role__in=models.PRIVILEGED_ROLES)
+        roles = set(document.get_roles(user))
+        if not roles:
+            return drf.response.Response([])
 
-        return queryset
+        ancestors = (
+            (document.get_ancestors() | models.Document.objects.filter(pk=document.pk))
+            .filter(ancestors_deleted_at__isnull=True)
+            .order_by("path")
+        )
+        highest_readable = ancestors.readable_per_se(user).only("depth").first()
 
-    def get_serializer_class(self):
-        if self.action == "list" and not self.is_current_user_owner_or_admin:
-            return serializers.DocumentAccessLightSerializer
+        if highest_readable is None:
+            return drf.response.Response([])
 
-        return super().get_serializer_class()
+        queryset = self.get_queryset()
+        queryset = queryset.filter(
+            document__in=ancestors.filter(depth__gte=highest_readable.depth)
+        )
+
+        is_privileged = bool(roles.intersection(set(models.PRIVILEGED_ROLES)))
+        if is_privileged:
+            serializer_class = serializers.DocumentAccessSerializer
+        else:
+            # Return only the document's privileged accesses
+            queryset = queryset.filter(role__in=models.PRIVILEGED_ROLES)
+            serializer_class = serializers.DocumentAccessLightSerializer
+
+        queryset = queryset.distinct()
+        serializer = serializer_class(
+            queryset, many=True, context=self.get_serializer_context()
+        )
+        return drf.response.Response(serializer.data)
 
     def perform_create(self, serializer):
         """Add a new access to the document and send an email to the new added user."""
@@ -1542,7 +1485,6 @@ class TemplateAccessViewSet(
     ResourceAccessViewsetMixin,
     drf.mixins.CreateModelMixin,
     drf.mixins.DestroyModelMixin,
-    drf.mixins.ListModelMixin,
     drf.mixins.RetrieveModelMixin,
     drf.mixins.UpdateModelMixin,
     viewsets.GenericViewSet,
@@ -1572,12 +1514,28 @@ class TemplateAccessViewSet(
     """
 
     lookup_field = "pk"
-    pagination_class = Pagination
     permission_classes = [permissions.IsAuthenticated, permissions.AccessPermission]
     queryset = models.TemplateAccess.objects.select_related("user").all()
     resource_field_name = "template"
     serializer_class = serializers.TemplateAccessSerializer
 
+    def list(self, request, *args, **kwargs):
+        """Restrict templates returned by the list endpoint"""
+        user = self.request.user
+        teams = user.teams
+        queryset = self.filter_queryset(self.get_queryset())
+
+        # Limit to resource access instances related to a resource THAT also has
+        # a resource access instance for the logged-in user (we don't want to list
+        # only the resource access instances pointing to the logged-in user)
+        queryset = queryset.filter(
+            db.Q(template__accesses__user=user)
+            | db.Q(template__accesses__team__in=teams),
+        ).distinct()
+
+        serializer = self.get_serializer(queryset, many=True)
+        return drf.response.Response(serializer.data)
+
 
 class InvitationViewset(
     drf.mixins.CreateModelMixin,
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index 2c5239ead..9f3a78b95 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -87,49 +87,61 @@ def get_select_options(cls, ancestors_links):
         """
         Determines the valid select options for link reach and link role depending on the
         list of ancestors' link reach/role.
-
         Args:
             ancestors_links: List of dictionaries, each with 'link_reach' and 'link_role' keys
                              representing the reach and role of ancestors links.
-
         Returns:
             Dictionary mapping possible reach levels to their corresponding possible roles.
         """
         # If no ancestors, return all options
         if not ancestors_links:
-            return dict.fromkeys(cls.values, LinkRoleChoices.values)
+            return {
+                reach: LinkRoleChoices.values if reach != cls.RESTRICTED else None
+                for reach in cls.values
+            }
 
         # Initialize result with all possible reaches and role options as sets
-        result = {reach: set(LinkRoleChoices.values) for reach in cls.values}
+        result = {
+            reach: set(LinkRoleChoices.values) if reach != cls.RESTRICTED else None
+            for reach in cls.values
+        }
 
         # Group roles by reach level
         reach_roles = defaultdict(set)
         for link in ancestors_links:
             reach_roles[link["link_reach"]].add(link["link_role"])
 
-        # Apply constraints based on ancestor links
-        if LinkRoleChoices.EDITOR in reach_roles[cls.RESTRICTED]:
-            result[cls.RESTRICTED].discard(LinkRoleChoices.READER)
+        # Rule 1: public/editor → override everything
+        if LinkRoleChoices.EDITOR in reach_roles.get(cls.PUBLIC, set()):
+            return {cls.PUBLIC: [LinkRoleChoices.EDITOR]}
 
-        if LinkRoleChoices.EDITOR in reach_roles[cls.AUTHENTICATED]:
+        # Rule 2: authenticated/editor
+        if LinkRoleChoices.EDITOR in reach_roles.get(cls.AUTHENTICATED, set()):
             result[cls.AUTHENTICATED].discard(LinkRoleChoices.READER)
             result.pop(cls.RESTRICTED, None)
-        elif LinkRoleChoices.READER in reach_roles[cls.AUTHENTICATED]:
-            result[cls.RESTRICTED].discard(LinkRoleChoices.READER)
 
-        if LinkRoleChoices.EDITOR in reach_roles[cls.PUBLIC]:
-            result[cls.PUBLIC].discard(LinkRoleChoices.READER)
+        # Rule 3: public/reader
+        if LinkRoleChoices.READER in reach_roles.get(cls.PUBLIC, set()):
             result.pop(cls.AUTHENTICATED, None)
             result.pop(cls.RESTRICTED, None)
-        elif LinkRoleChoices.READER in reach_roles[cls.PUBLIC]:
-            result[cls.AUTHENTICATED].discard(LinkRoleChoices.READER)
-            result.get(cls.RESTRICTED, set()).discard(LinkRoleChoices.READER)
 
-        # Convert roles sets to lists while maintaining the order from LinkRoleChoices
-        for reach, roles in result.items():
-            result[reach] = [role for role in LinkRoleChoices.values if role in roles]
+        # Rule 4: authenticated/reader
+        if LinkRoleChoices.READER in reach_roles.get(cls.AUTHENTICATED, set()):
+            result.pop(cls.RESTRICTED, None)
+
+        # Clean up: remove empty entries and convert sets to ordered lists
+        cleaned = {}
+        for reach in cls.values:
+            if reach in result:
+                if result[reach]:
+                    cleaned[reach] = [
+                        r for r in LinkRoleChoices.values if r in result[reach]
+                    ]
+                else:
+                    # Could be [] or None (for RESTRICTED reach)
+                    cleaned[reach] = result[reach]
 
-        return result
+        return cleaned
 
 
 class DuplicateEmailError(Exception):
@@ -452,6 +464,41 @@ def readable_per_se(self, user):
 
         return self.filter(link_reach=LinkReachChoices.PUBLIC)
 
+    def annotate_is_favorite(self, user):
+        """
+        Annotate document queryset with the favorite status for the current user.
+        """
+        if user.is_authenticated:
+            favorite_exists_subquery = DocumentFavorite.objects.filter(
+                document_id=models.OuterRef("pk"), user=user
+            )
+            return self.annotate(is_favorite=models.Exists(favorite_exists_subquery))
+
+        return self.annotate(is_favorite=models.Value(False))
+
+    def annotate_user_roles(self, user):
+        """
+        Annotate document queryset with the roles of the current user
+        on the document or its ancestors.
+        """
+        output_field = ArrayField(base_field=models.CharField())
+
+        if user.is_authenticated:
+            user_roles_subquery = DocumentAccess.objects.filter(
+                models.Q(user=user) | models.Q(team__in=user.teams),
+                document__path=Left(models.OuterRef("path"), Length("document__path")),
+            ).values_list("role", flat=True)
+
+            return self.annotate(
+                user_roles=models.Func(
+                    user_roles_subquery, function="ARRAY", output_field=output_field
+                )
+            )
+
+        return self.annotate(
+            user_roles=models.Value([], output_field=output_field),
+        )
+
 
 class DocumentManager(MP_NodeManager.from_queryset(DocumentQuerySet)):
     """
@@ -737,17 +784,16 @@ def get_roles(self, user):
                 roles = []
         return roles
 
-    def get_links_definitions(self, ancestors_links):
-        """Get links reach/role definitions for the current document and its ancestors."""
+    def get_ancestors_links_definitions(self, ancestors_links):
+        """Get links reach/role definitions for ancestors of the current document."""
 
-        links_definitions = defaultdict(set)
-        links_definitions[self.link_reach].add(self.link_role)
-
-        # Merge ancestor link definitions
+        ancestors_links_definitions = defaultdict(set)
         for ancestor in ancestors_links:
-            links_definitions[ancestor["link_reach"]].add(ancestor["link_role"])
+            ancestors_links_definitions[ancestor["link_reach"]].add(
+                ancestor["link_role"]
+            )
 
-        return dict(links_definitions)  # Convert defaultdict back to a normal dict
+        return ancestors_links_definitions
 
     def compute_ancestors_links(self, user):
         """
@@ -803,10 +849,20 @@ def get_abilities(self, user, ancestors_links=None):
         ) and not is_deleted
 
         # Add roles provided by the document link, taking into account its ancestors
-        links_definitions = self.get_links_definitions(ancestors_links)
-        public_roles = links_definitions.get(LinkReachChoices.PUBLIC, set())
+        ancestors_links_definitions = self.get_ancestors_links_definitions(
+            ancestors_links
+        )
+
+        public_roles = ancestors_links_definitions.get(
+            LinkReachChoices.PUBLIC, set()
+        ) | ({self.link_role} if self.link_reach == LinkReachChoices.PUBLIC else set())
         authenticated_roles = (
-            links_definitions.get(LinkReachChoices.AUTHENTICATED, set())
+            ancestors_links_definitions.get(LinkReachChoices.AUTHENTICATED, set())
+            | (
+                {self.link_role}
+                if self.link_reach == LinkReachChoices.AUTHENTICATED
+                else set()
+            )
             if user.is_authenticated
             else set()
         )
@@ -850,6 +906,9 @@ def get_abilities(self, user, ancestors_links=None):
             "restore": is_owner,
             "retrieve": can_get,
             "media_auth": can_get,
+            "ancestors_links_definitions": {
+                k: list(v) for k, v in ancestors_links_definitions.items()
+            },
             "link_select_options": LinkReachChoices.get_select_options(ancestors_links),
             "tree": can_get,
             "update": can_update,
diff --git a/src/backend/core/tests/documents/test_api_document_accesses.py b/src/backend/core/tests/documents/test_api_document_accesses.py
index bf5ef1827..e30a6c364 100644
--- a/src/backend/core/tests/documents/test_api_document_accesses.py
+++ b/src/backend/core/tests/documents/test_api_document_accesses.py
@@ -51,12 +51,7 @@ def test_api_document_accesses_list_authenticated_unrelated():
         f"/api/v1.0/documents/{document.id!s}/accesses/",
     )
     assert response.status_code == 200
-    assert response.json() == {
-        "count": 0,
-        "next": None,
-        "previous": None,
-        "results": [],
-    }
+    assert response.json() == []
 
 
 def test_api_document_accesses_list_unexisting_document():
@@ -70,12 +65,7 @@ def test_api_document_accesses_list_unexisting_document():
 
     response = client.get(f"/api/v1.0/documents/{uuid4()!s}/accesses/")
     assert response.status_code == 200
-    assert response.json() == {
-        "count": 0,
-        "next": None,
-        "previous": None,
-        "results": [],
-    }
+    assert response.json() == []
 
 
 @pytest.mark.parametrize("via", VIA)
@@ -86,22 +76,30 @@ def test_api_document_accesses_list_authenticated_related_non_privileged(
     via, role, mock_user_teams
 ):
     """
-    Authenticated users should be able to list document accesses for a document
-    to which they are directly related, whatever their role in the document.
+    Authenticated users with no privileged role should only be able to list document
+    accesses associated with privileged roles for a document, including from ancestors.
     """
     user = factories.UserFactory()
-
     client = APIClient()
     client.force_login(user)
 
-    owner = factories.UserFactory()
-    accesses = []
-
-    document_access = factories.UserDocumentAccessFactory(
-        user=owner, role=models.RoleChoices.OWNER
+    # Create documents structured as a tree
+    unreadable_ancestor = factories.DocumentFactory(link_reach="restricted")
+    # make all documents below the grand parent readable without a specific access for the user
+    grand_parent = factories.DocumentFactory(
+        parent=unreadable_ancestor, link_reach="authenticated"
     )
-    accesses.append(document_access)
-    document = document_access.document
+    parent = factories.DocumentFactory(parent=grand_parent)
+    document = factories.DocumentFactory(parent=parent)
+    child = factories.DocumentFactory(parent=document)
+
+    # Create accesses related to each document
+    factories.UserDocumentAccessFactory(document=unreadable_ancestor)
+    grand_parent_access = factories.UserDocumentAccessFactory(document=grand_parent)
+    parent_access = factories.UserDocumentAccessFactory(document=parent)
+    document_access = factories.UserDocumentAccessFactory(document=document)
+    factories.UserDocumentAccessFactory(document=child)
+
     if via == USER:
         models.DocumentAccess.objects.create(
             document=document,
@@ -118,8 +116,6 @@ def test_api_document_accesses_list_authenticated_related_non_privileged(
 
     access1 = factories.TeamDocumentAccessFactory(document=document)
     access2 = factories.UserDocumentAccessFactory(document=document)
-    accesses.append(access1)
-    accesses.append(access2)
 
     # Accesses for other documents to which the user is related should not be listed either
     other_access = factories.UserDocumentAccessFactory(user=user)
@@ -129,14 +125,17 @@ def test_api_document_accesses_list_authenticated_related_non_privileged(
         f"/api/v1.0/documents/{document.id!s}/accesses/",
     )
 
-    # Return only owners
-    owners_accesses = [
-        access for access in accesses if access.role in models.PRIVILEGED_ROLES
-    ]
     assert response.status_code == 200
     content = response.json()
-    assert content["count"] == len(owners_accesses)
-    assert sorted(content["results"], key=lambda x: x["id"]) == sorted(
+
+    # Make sure only privileged roles are returned
+    accesses = [grand_parent_access, parent_access, document_access, access1, access2]
+    privileged_accesses = [
+        acc for acc in accesses if acc.role in models.PRIVILEGED_ROLES
+    ]
+    assert len(content) == len(privileged_accesses)
+
+    assert sorted(content, key=lambda x: x["id"]) == sorted(
         [
             {
                 "id": str(access.id),
@@ -152,38 +151,44 @@ def test_api_document_accesses_list_authenticated_related_non_privileged(
                 "role": access.role,
                 "abilities": access.get_abilities(user),
             }
-            for access in owners_accesses
+            for access in privileged_accesses
         ],
         key=lambda x: x["id"],
     )
 
-    for access in content["results"]:
-        assert access["role"] in models.PRIVILEGED_ROLES
-
 
 @pytest.mark.parametrize("via", VIA)
-@pytest.mark.parametrize("role", models.PRIVILEGED_ROLES)
-def test_api_document_accesses_list_authenticated_related_privileged_roles(
+@pytest.mark.parametrize(
+    "role", [role for role in models.RoleChoices if role in models.PRIVILEGED_ROLES]
+)
+def test_api_document_accesses_list_authenticated_related_privileged(
     via, role, mock_user_teams
 ):
     """
-    Authenticated users should be able to list document accesses for a document
-    to which they are directly related, whatever their role in the document.
+    Authenticated users with a privileged role should be able to list all
+    document accesses whatever the role, including from ancestors.
     """
     user = factories.UserFactory()
-
     client = APIClient()
     client.force_login(user)
 
-    owner = factories.UserFactory()
-    accesses = []
-
-    document_access = factories.UserDocumentAccessFactory(
-        user=owner, role=models.RoleChoices.OWNER
+    # Create documents structured as a tree
+    unreadable_ancestor = factories.DocumentFactory(link_reach="restricted")
+    # make all documents below the grand parent readable without a specific access for the user
+    grand_parent = factories.DocumentFactory(
+        parent=unreadable_ancestor, link_reach="authenticated"
     )
-    accesses.append(document_access)
-    document = document_access.document
-    user_access = None
+    parent = factories.DocumentFactory(parent=grand_parent)
+    document = factories.DocumentFactory(parent=parent)
+    child = factories.DocumentFactory(parent=document)
+
+    # Create accesses related to each document
+    factories.UserDocumentAccessFactory(document=unreadable_ancestor)
+    grand_parent_access = factories.UserDocumentAccessFactory(document=grand_parent)
+    parent_access = factories.UserDocumentAccessFactory(document=parent)
+    document_access = factories.UserDocumentAccessFactory(document=document)
+    factories.UserDocumentAccessFactory(document=child)
+
     if via == USER:
         user_access = models.DocumentAccess.objects.create(
             document=document,
@@ -197,11 +202,11 @@ def test_api_document_accesses_list_authenticated_related_privileged_roles(
             team="lasuite",
             role=role,
         )
+    else:
+        raise RuntimeError()
 
     access1 = factories.TeamDocumentAccessFactory(document=document)
     access2 = factories.UserDocumentAccessFactory(document=document)
-    accesses.append(access1)
-    accesses.append(access2)
 
     # Accesses for other documents to which the user is related should not be listed either
     other_access = factories.UserDocumentAccessFactory(user=user)
@@ -211,42 +216,39 @@ def test_api_document_accesses_list_authenticated_related_privileged_roles(
         f"/api/v1.0/documents/{document.id!s}/accesses/",
     )
 
-    access2_user = serializers.UserSerializer(instance=access2.user).data
-    base_user = serializers.UserSerializer(instance=user).data
-
     assert response.status_code == 200
     content = response.json()
-    assert len(content["results"]) == 4
-    assert sorted(content["results"], key=lambda x: x["id"]) == sorted(
+
+    # Make sure all expected accesses are returned
+    accesses = [
+        user_access,
+        grand_parent_access,
+        parent_access,
+        document_access,
+        access1,
+        access2,
+    ]
+    assert len(content) == 6
+
+    assert sorted(content, key=lambda x: x["id"]) == sorted(
         [
             {
-                "id": str(user_access.id),
-                "user": base_user if via == "user" else None,
-                "team": "lasuite" if via == "team" else "",
-                "role": user_access.role,
-                "abilities": user_access.get_abilities(user),
-            },
-            {
-                "id": str(access1.id),
-                "user": None,
-                "team": access1.team,
-                "role": access1.role,
-                "abilities": access1.get_abilities(user),
-            },
-            {
-                "id": str(access2.id),
-                "user": access2_user,
-                "team": "",
-                "role": access2.role,
-                "abilities": access2.get_abilities(user),
-            },
-            {
-                "id": str(document_access.id),
-                "user": serializers.UserSerializer(instance=owner).data,
-                "team": "",
-                "role": models.RoleChoices.OWNER,
-                "abilities": document_access.get_abilities(user),
-            },
+                "id": str(access.id),
+                "document_id": str(access.document_id),
+                "user": {
+                    "id": str(access.user.id),
+                    "email": access.user.email,
+                    "language": access.user.language,
+                    "full_name": access.user.full_name,
+                    "short_name": access.user.short_name,
+                }
+                if access.user
+                else None,
+                "team": access.team,
+                "role": access.role,
+                "abilities": access.get_abilities(user),
+            }
+            for access in accesses
         ],
         key=lambda x: x["id"],
     )
@@ -341,6 +343,7 @@ def test_api_document_accesses_retrieve_authenticated_related(
         assert response.status_code == 200
         assert response.json() == {
             "id": str(access.id),
+            "document_id": str(access.document_id),
             "user": access_user,
             "team": "",
             "role": access.role,
diff --git a/src/backend/core/tests/documents/test_api_document_accesses_create.py b/src/backend/core/tests/documents/test_api_document_accesses_create.py
index db67ece18..dc3f752de 100644
--- a/src/backend/core/tests/documents/test_api_document_accesses_create.py
+++ b/src/backend/core/tests/documents/test_api_document_accesses_create.py
@@ -165,6 +165,7 @@ def test_api_document_accesses_create_authenticated_administrator(via, mock_user
     other_user = serializers.UserSerializer(instance=other_user).data
     assert response.json() == {
         "abilities": new_document_access.get_abilities(user),
+        "document_id": str(new_document_access.document_id),
         "id": str(new_document_access.id),
         "team": "",
         "role": role,
@@ -222,6 +223,7 @@ def test_api_document_accesses_create_authenticated_owner(via, mock_user_teams):
     new_document_access = models.DocumentAccess.objects.filter(user=other_user).get()
     other_user = serializers.UserSerializer(instance=other_user).data
     assert response.json() == {
+        "document_id": str(new_document_access.document_id),
         "id": str(new_document_access.id),
         "user": other_user,
         "team": "",
@@ -286,6 +288,7 @@ def test_api_document_accesses_create_email_in_receivers_language(via, mock_user
         ).get()
         other_user_data = serializers.UserSerializer(instance=other_user).data
         assert response.json() == {
+            "document_id": str(new_document_access.document_id),
             "id": str(new_document_access.id),
             "user": other_user_data,
             "team": "",
diff --git a/src/backend/core/tests/documents/test_api_documents_retrieve.py b/src/backend/core/tests/documents/test_api_documents_retrieve.py
index 38d66cd46..88507147a 100644
--- a/src/backend/core/tests/documents/test_api_documents_retrieve.py
+++ b/src/backend/core/tests/documents/test_api_documents_retrieve.py
@@ -42,10 +42,11 @@ def test_api_documents_retrieve_anonymous_public_standalone():
             "favorite": False,
             "invite_owner": False,
             "link_configuration": False,
+            "ancestors_links_definitions": {},
             "link_select_options": {
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
-                "restricted": ["reader", "editor"],
+                "restricted": None,
             },
             "media_auth": True,
             "move": False,
@@ -97,6 +98,10 @@ def test_api_documents_retrieve_anonymous_public_parent():
             "accesses_view": False,
             "ai_transform": False,
             "ai_translate": False,
+            "ancestors_links_definitions": {
+                "public": [grand_parent.link_role],
+                parent.link_reach: [parent.link_role],
+            },
             "attachment_upload": grand_parent.link_role == "editor",
             "children_create": False,
             "children_list": True,
@@ -193,6 +198,7 @@ def test_api_documents_retrieve_authenticated_unrelated_public_or_authenticated(
             "accesses_view": False,
             "ai_transform": document.link_role == "editor",
             "ai_translate": document.link_role == "editor",
+            "ancestors_links_definitions": {},
             "attachment_upload": document.link_role == "editor",
             "children_create": document.link_role == "editor",
             "children_list": True,
@@ -207,7 +213,7 @@ def test_api_documents_retrieve_authenticated_unrelated_public_or_authenticated(
             "link_select_options": {
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
-                "restricted": ["reader", "editor"],
+                "restricted": None,
             },
             "media_auth": True,
             "move": False,
@@ -267,6 +273,10 @@ def test_api_documents_retrieve_authenticated_public_or_authenticated_parent(rea
             "accesses_view": False,
             "ai_transform": grand_parent.link_role == "editor",
             "ai_translate": grand_parent.link_role == "editor",
+            "ancestors_links_definitions": {
+                grand_parent.link_reach: [grand_parent.link_role],
+                "restricted": [parent.link_role],
+            },
             "attachment_upload": grand_parent.link_role == "editor",
             "children_create": grand_parent.link_role == "editor",
             "children_list": True,
@@ -440,6 +450,7 @@ def test_api_documents_retrieve_authenticated_related_parent():
     )
     assert response.status_code == 200
     links = document.get_ancestors().values("link_reach", "link_role")
+    ancestors_roles = list({grand_parent.link_role, parent.link_role})
     assert response.json() == {
         "id": str(document.id),
         "abilities": {
@@ -447,6 +458,7 @@ def test_api_documents_retrieve_authenticated_related_parent():
             "accesses_view": True,
             "ai_transform": access.role != "reader",
             "ai_translate": access.role != "reader",
+            "ancestors_links_definitions": {"restricted": ancestors_roles},
             "attachment_upload": access.role != "reader",
             "children_create": access.role != "reader",
             "children_list": True,
diff --git a/src/backend/core/tests/documents/test_api_documents_trashbin.py b/src/backend/core/tests/documents/test_api_documents_trashbin.py
index 6db898eaf..b48ba252b 100644
--- a/src/backend/core/tests/documents/test_api_documents_trashbin.py
+++ b/src/backend/core/tests/documents/test_api_documents_trashbin.py
@@ -74,6 +74,7 @@ def test_api_documents_trashbin_format():
             "accesses_view": True,
             "ai_transform": True,
             "ai_translate": True,
+            "ancestors_links_definitions": {},
             "attachment_upload": True,
             "children_create": True,
             "children_list": True,
@@ -88,7 +89,7 @@ def test_api_documents_trashbin_format():
             "link_select_options": {
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
-                "restricted": ["reader", "editor"],
+                "restricted": None,
             },
             "media_auth": True,
             "move": False,  # Can't move a deleted document
diff --git a/src/backend/core/tests/templates/test_api_template_accesses.py b/src/backend/core/tests/templates/test_api_template_accesses.py
index 86e5f2bd5..6d1107768 100644
--- a/src/backend/core/tests/templates/test_api_template_accesses.py
+++ b/src/backend/core/tests/templates/test_api_template_accesses.py
@@ -48,12 +48,7 @@ def test_api_template_accesses_list_authenticated_unrelated():
         f"/api/v1.0/templates/{template.id!s}/accesses/",
     )
     assert response.status_code == 200
-    assert response.json() == {
-        "count": 0,
-        "next": None,
-        "previous": None,
-        "results": [],
-    }
+    assert response.json() == []
 
 
 @pytest.mark.parametrize("via", VIA)
@@ -96,8 +91,8 @@ def test_api_template_accesses_list_authenticated_related(via, mock_user_teams):
 
     assert response.status_code == 200
     content = response.json()
-    assert len(content["results"]) == 3
-    assert sorted(content["results"], key=lambda x: x["id"]) == sorted(
+    assert len(content) == 3
+    assert sorted(content, key=lambda x: x["id"]) == sorted(
         [
             {
                 "id": str(user_access.id),
diff --git a/src/backend/core/tests/test_models_documents.py b/src/backend/core/tests/test_models_documents.py
index 3f2b8d6e0..908215369 100644
--- a/src/backend/core/tests/test_models_documents.py
+++ b/src/backend/core/tests/test_models_documents.py
@@ -154,6 +154,7 @@ def test_models_documents_get_abilities_forbidden(
         "accesses_view": False,
         "ai_transform": False,
         "ai_translate": False,
+        "ancestors_links_definitions": {},
         "attachment_upload": False,
         "children_create": False,
         "children_list": False,
@@ -170,7 +171,7 @@ def test_models_documents_get_abilities_forbidden(
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "partial_update": False,
         "restore": False,
@@ -214,6 +215,7 @@ def test_models_documents_get_abilities_reader(
         "accesses_view": False,
         "ai_transform": False,
         "ai_translate": False,
+        "ancestors_links_definitions": {},
         "attachment_upload": False,
         "children_create": False,
         "children_list": True,
@@ -228,7 +230,7 @@ def test_models_documents_get_abilities_reader(
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": False,
@@ -250,7 +252,7 @@ def test_models_documents_get_abilities_reader(
     assert all(
         value is False
         for key, value in document.get_abilities(user).items()
-        if key != "link_select_options"
+        if key not in ["link_select_options", "ancestors_links_definitions"]
     )
 
 
@@ -276,6 +278,7 @@ def test_models_documents_get_abilities_editor(
         "accesses_view": False,
         "ai_transform": is_authenticated,
         "ai_translate": is_authenticated,
+        "ancestors_links_definitions": {},
         "attachment_upload": True,
         "children_create": is_authenticated,
         "children_list": True,
@@ -290,7 +293,7 @@ def test_models_documents_get_abilities_editor(
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": False,
@@ -311,7 +314,7 @@ def test_models_documents_get_abilities_editor(
     assert all(
         value is False
         for key, value in document.get_abilities(user).items()
-        if key != "link_select_options"
+        if key not in ["link_select_options", "ancestors_links_definitions"]
     )
 
 
@@ -327,6 +330,7 @@ def test_models_documents_get_abilities_owner(django_assert_num_queries):
         "accesses_view": True,
         "ai_transform": True,
         "ai_translate": True,
+        "ancestors_links_definitions": {},
         "attachment_upload": True,
         "children_create": True,
         "children_list": True,
@@ -341,7 +345,7 @@ def test_models_documents_get_abilities_owner(django_assert_num_queries):
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": True,
@@ -375,6 +379,7 @@ def test_models_documents_get_abilities_administrator(django_assert_num_queries)
         "accesses_view": True,
         "ai_transform": True,
         "ai_translate": True,
+        "ancestors_links_definitions": {},
         "attachment_upload": True,
         "children_create": True,
         "children_list": True,
@@ -389,7 +394,7 @@ def test_models_documents_get_abilities_administrator(django_assert_num_queries)
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": True,
@@ -410,7 +415,7 @@ def test_models_documents_get_abilities_administrator(django_assert_num_queries)
     assert all(
         value is False
         for key, value in document.get_abilities(user).items()
-        if key != "link_select_options"
+        if key not in ["link_select_options", "ancestors_links_definitions"]
     )
 
 
@@ -426,6 +431,7 @@ def test_models_documents_get_abilities_editor_user(django_assert_num_queries):
         "accesses_view": True,
         "ai_transform": True,
         "ai_translate": True,
+        "ancestors_links_definitions": {},
         "attachment_upload": True,
         "children_create": True,
         "children_list": True,
@@ -440,7 +446,7 @@ def test_models_documents_get_abilities_editor_user(django_assert_num_queries):
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": False,
@@ -461,7 +467,7 @@ def test_models_documents_get_abilities_editor_user(django_assert_num_queries):
     assert all(
         value is False
         for key, value in document.get_abilities(user).items()
-        if key != "link_select_options"
+        if key not in ["link_select_options", "ancestors_links_definitions"]
     )
 
 
@@ -484,6 +490,7 @@ def test_models_documents_get_abilities_reader_user(
         # You should not access AI if it's restricted to users with specific access
         "ai_transform": access_from_link and ai_access_setting != "restricted",
         "ai_translate": access_from_link and ai_access_setting != "restricted",
+        "ancestors_links_definitions": {},
         "attachment_upload": access_from_link,
         "children_create": access_from_link,
         "children_list": True,
@@ -498,7 +505,7 @@ def test_models_documents_get_abilities_reader_user(
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": False,
@@ -521,7 +528,7 @@ def test_models_documents_get_abilities_reader_user(
         assert all(
             value is False
             for key, value in document.get_abilities(user).items()
-            if key != "link_select_options"
+            if key not in ["link_select_options", "ancestors_links_definitions"]
         )
 
 
@@ -540,6 +547,7 @@ def test_models_documents_get_abilities_preset_role(django_assert_num_queries):
         "accesses_view": True,
         "ai_transform": False,
         "ai_translate": False,
+        "ancestors_links_definitions": {},
         "attachment_upload": False,
         "children_create": False,
         "children_list": True,
@@ -554,7 +562,7 @@ def test_models_documents_get_abilities_preset_role(django_assert_num_queries):
         "link_select_options": {
             "authenticated": ["reader", "editor"],
             "public": ["reader", "editor"],
-            "restricted": ["reader", "editor"],
+            "restricted": None,
         },
         "media_auth": True,
         "move": False,
@@ -1174,8 +1182,6 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
         (
             [{"link_reach": "public", "link_role": "reader"}],
             {
-                "restricted": ["editor"],
-                "authenticated": ["editor"],
                 "public": ["reader", "editor"],
             },
         ),
@@ -1183,7 +1189,6 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
         (
             [{"link_reach": "authenticated", "link_role": "reader"}],
             {
-                "restricted": ["editor"],
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
             },
@@ -1195,7 +1200,7 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
         (
             [{"link_reach": "restricted", "link_role": "reader"}],
             {
-                "restricted": ["reader", "editor"],
+                "restricted": None,
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
             },
@@ -1203,7 +1208,7 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
         (
             [{"link_reach": "restricted", "link_role": "editor"}],
             {
-                "restricted": ["editor"],
+                "restricted": None,
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
             },
@@ -1229,7 +1234,7 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
                 {"link_reach": "restricted", "link_role": "editor"},
             ],
             {
-                "restricted": ["editor"],
+                "restricted": None,
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
             },
@@ -1241,8 +1246,6 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
                 {"link_reach": "public", "link_role": "reader"},
             ],
             {
-                "restricted": ["editor"],
-                "authenticated": ["editor"],
                 "public": ["reader", "editor"],
             },
         ),
@@ -1253,8 +1256,6 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
                 {"link_reach": "public", "link_role": "reader"},
             ],
             {
-                "restricted": ["editor"],
-                "authenticated": ["editor"],
                 "public": ["reader", "editor"],
             },
         ),
@@ -1264,7 +1265,7 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
                 {"link_reach": "authenticated", "link_role": "editor"},
                 {"link_reach": "public", "link_role": "reader"},
             ],
-            {"authenticated": ["editor"], "public": ["reader", "editor"]},
+            {"public": ["reader", "editor"]},
         ),
         (
             [
@@ -1279,7 +1280,6 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
                 {"link_reach": "authenticated", "link_role": "reader"},
             ],
             {
-                "restricted": ["editor"],
                 "authenticated": ["reader", "editor"],
                 "public": ["reader", "editor"],
             },
@@ -1297,7 +1297,7 @@ def test_models_documents_restore_complex_bis(django_assert_num_queries):
             {
                 "public": ["reader", "editor"],
                 "authenticated": ["reader", "editor"],
-                "restricted": ["reader", "editor"],
+                "restricted": None,
             },
         ),
     ],