diff --git a/changes/10029.feature.md b/changes/10029.feature.md
new file mode 100644
index 00000000000..b857589fa0e
--- /dev/null
+++ b/changes/10029.feature.md
@@ -0,0 +1 @@
+Apply RBAC validators to project (group) action processors for proper permission enforcement
\ No newline at end of file
diff --git a/src/ai/backend/manager/services/group/actions/base.py b/src/ai/backend/manager/services/group/actions/base.py
index 2ab78041d05..595bd815096 100644
--- a/src/ai/backend/manager/services/group/actions/base.py
+++ b/src/ai/backend/manager/services/group/actions/base.py
@@ -41,3 +41,29 @@ def field_data(self) -> FieldData | None:
 
 class GroupSingleEntityActionResult(BaseSingleEntityActionResult):
     pass
+
+
+class ProjectScopeAction(BaseScopeAction):
+    @override
+    @classmethod
+    def entity_type(cls) -> EntityType:
+        return EntityType.PROJECT
+
+
+class ProjectScopeActionResult(BaseScopeActionResult):
+    pass
+
+
+class ProjectSingleEntityAction(BaseSingleEntityAction):
+    @override
+    @classmethod
+    def entity_type(cls) -> EntityType:
+        return EntityType.PROJECT
+
+    @override
+    def field_data(self) -> FieldData | None:
+        return None
+
+
+class ProjectSingleEntityActionResult(BaseSingleEntityActionResult):
+    pass
diff --git a/src/ai/backend/manager/services/group/actions/search_projects.py b/src/ai/backend/manager/services/group/actions/search_projects.py
index 4bc438ffd53..ced71d19ca3 100644
--- a/src/ai/backend/manager/services/group/actions/search_projects.py
+++ b/src/ai/backend/manager/services/group/actions/search_projects.py
@@ -18,10 +18,10 @@
 )
 from ai.backend.manager.services.group.actions.base import (
     GroupAction,
-    GroupScopeAction,
-    GroupScopeActionResult,
-    GroupSingleEntityAction,
-    GroupSingleEntityActionResult,
+    ProjectScopeAction,
+    ProjectScopeActionResult,
+    ProjectSingleEntityAction,
+    ProjectSingleEntityActionResult,
 )
 
 
@@ -42,7 +42,7 @@ def operation_type(cls) -> ActionOperationType:
 
 
 @dataclass
-class SearchProjectsByDomainAction(GroupScopeAction):
+class SearchProjectsByDomainAction(ProjectScopeAction):
     """Search projects within a domain."""
 
     scope: DomainProjectSearchScope
@@ -67,7 +67,7 @@ def target_element(self) -> RBACElementRef:
 
 
 @dataclass
-class SearchProjectsByUserAction(GroupScopeAction):
+class SearchProjectsByUserAction(ProjectScopeAction):
     """Search projects a user is member of."""
 
     scope: UserProjectSearchScope
@@ -92,7 +92,7 @@ def target_element(self) -> RBACElementRef:
 
 
 @dataclass
-class GetProjectAction(GroupSingleEntityAction):
+class GetProjectAction(ProjectSingleEntityAction):
     """Get a single project by UUID."""
 
     project_id: UUID
@@ -129,7 +129,7 @@ def entity_id(self) -> str | None:
 
 
 @dataclass
-class ScopedSearchProjectsActionResult(GroupScopeActionResult):
+class ScopedSearchProjectsActionResult(ProjectScopeActionResult):
     """Result from searching projects within a scope."""
 
     items: list[GroupData]
@@ -149,7 +149,7 @@ def scope_id(self) -> str:
 
 
 @dataclass
-class GetProjectActionResult(GroupSingleEntityActionResult):
+class GetProjectActionResult(ProjectSingleEntityActionResult):
     """Result from getting a single project."""
 
     data: GroupData
diff --git a/src/ai/backend/manager/services/group/processors.py b/src/ai/backend/manager/services/group/processors.py
index 51c0e6c1719..73a02dddd4e 100644
--- a/src/ai/backend/manager/services/group/processors.py
+++ b/src/ai/backend/manager/services/group/processors.py
@@ -64,10 +64,20 @@ def __init__(
         action_monitors: list[ActionMonitor],
         validators: ActionValidators,
     ) -> None:
-        self.create_group = ScopeActionProcessor(group_service.create_group, action_monitors)
-        self.modify_group = SingleEntityActionProcessor(group_service.modify_group, action_monitors)
-        self.delete_group = SingleEntityActionProcessor(group_service.delete_group, action_monitors)
-        self.purge_group = SingleEntityActionProcessor(group_service.purge_group, action_monitors)
+        rbac_scope_validators = [validators.rbac.scope]
+        rbac_single_entity_validators = [validators.rbac.single_entity]
+        self.create_group = ScopeActionProcessor(
+            group_service.create_group, action_monitors, validators=rbac_scope_validators
+        )
+        self.modify_group = SingleEntityActionProcessor(
+            group_service.modify_group, action_monitors, validators=rbac_single_entity_validators
+        )
+        self.delete_group = SingleEntityActionProcessor(
+            group_service.delete_group, action_monitors, validators=rbac_single_entity_validators
+        )
+        self.purge_group = SingleEntityActionProcessor(
+            group_service.purge_group, action_monitors, validators=rbac_single_entity_validators
+        )
         self.usage_per_month = ActionProcessor(group_service.usage_per_month, action_monitors)
         self.usage_per_period = ActionProcessor(group_service.usage_per_period, action_monitors)
         self.search_projects = ActionProcessor(group_service.search_projects, action_monitors)
@@ -77,7 +87,9 @@ def __init__(
         self.search_projects_by_user = ScopeActionProcessor(
             group_service.search_projects_by_user, action_monitors
         )
-        self.get_project = SingleEntityActionProcessor(group_service.get_project, action_monitors)
+        self.get_project = SingleEntityActionProcessor(
+            group_service.get_project, action_monitors, validators=rbac_single_entity_validators
+        )
 
     @override
     def supported_actions(self) -> list[ActionSpec]: