diff --git a/fastapi_modules/fastapi_leaudit/services/impl/rbacAdminServiceImpl.py b/fastapi_modules/fastapi_leaudit/services/impl/rbacAdminServiceImpl.py
index 8130d5e..9e0591c 100644
--- a/fastapi_modules/fastapi_leaudit/services/impl/rbacAdminServiceImpl.py
+++ b/fastapi_modules/fastapi_leaudit/services/impl/rbacAdminServiceImpl.py
@@ -1212,6 +1212,7 @@ class RbacAdminServiceImpl(IRbacAdminService):
         routeIds = sorted(set(Body.route_ids))
         async with GetAsyncSession() as Session:
             await self._getAdminRouteMap(Session, EnsureSeeds=True)
+            await self._assertCanManageTargetRole(Session, CurrentUserId, RoleId)
             result = await self._updateRoleRoutesInSession(Session, RoleId, routeIds, Body.permission)
             await Session.commit()
         PermissionServiceImpl.InvalidateAll()
@@ -1243,6 +1244,7 @@ class RbacAdminServiceImpl(IRbacAdminService):
         await self._assertManageAndPermission(CurrentUserId, "rbac:role_permissions:write")
         async with GetAsyncSession() as Session:
             await self._getAdminRouteMap(Session, EnsureSeeds=True)
+            await self._assertCanManageTargetRole(Session, CurrentUserId, Body.role_id)
             await self._saveRolePermissionsInSession(Session, Body.role_id, Body.permissions, Body.replace, Body.replace_scope_permission_ids)
             await Session.commit()
         PermissionServiceImpl.InvalidateAll()
@@ -1259,6 +1261,7 @@ class RbacAdminServiceImpl(IRbacAdminService):
         ]
         async with GetAsyncSession() as Session:
             await self._getAdminRouteMap(Session, EnsureSeeds=True)
+            await self._assertCanManageTargetRole(Session, CurrentUserId, RoleId)
             routeResult = await self._updateRoleRoutesInSession(Session, RoleId, routeIds, Body.route_permission)
             await self._saveRolePermissionsInSession(Session, RoleId, permissionConfigs, True, Body.replace_scope_permission_ids)
             permissionResult = await self._getRolePermissionsInSession(Session, RoleId)
@@ -1539,7 +1542,8 @@ class RbacAdminServiceImpl(IRbacAdminService):
                             {tenant_name_select},
                             COALESCE(bool_or(r.role_key IN ('super_admin', 'provincial_admin')), FALSE) AS is_global,
                             COALESCE(bool_or(r.role_key IN ('super_admin', 'provincial_admin', 'admin')), FALSE) AS can_manage,
-                            COALESCE(bool_or(r.role_key = 'super_admin'), FALSE) AS is_super_admin
+                            COALESCE(bool_or(r.role_key = 'super_admin'), FALSE) AS is_super_admin,
+                            COALESCE(MAX(COALESCE(r.priority, 0)), 0) AS max_role_priority
                         FROM sso_users u
                         LEFT JOIN user_role ur ON ur.user_id = u.id
                         LEFT JOIN roles r ON r.id = ur.role_id
@@ -1566,6 +1570,7 @@ class RbacAdminServiceImpl(IRbacAdminService):
             "is_global": bool(row["is_global"]),
             "can_manage": bool(row["can_manage"]),
             "is_super_admin": bool(row["is_super_admin"]),
+            "max_role_priority": int(row["max_role_priority"] or 0),
         }
 
     async def _resolve_requested_scope(self, Session, RawValue: str | None) -> dict[str, str]:
@@ -1869,6 +1874,21 @@ class RbacAdminServiceImpl(IRbacAdminService):
             raise LeauditException(StatusCodeEnum.HTTP_404_NOT_FOUND, "角色不存在")
         return row
 
+    async def _assertCanManageTargetRole(self, Session, CurrentUserId: int, RoleId: int) -> None:
+        """禁止低优先级角色编辑更高优先级角色的权限配置。"""
+        context = await self._getCurrentUserContext(CurrentUserId)
+        if context.get("is_super_admin"):
+            return
+
+        target = await self._getRoleRow(Session, RoleId)
+        currentPriority = int(context.get("max_role_priority") or 0)
+        targetPriority = int(target.get("priority") or 0)
+        if targetPriority > currentPriority:
+            raise LeauditException(
+                StatusCodeEnum.HTTP_403_FORBIDDEN,
+                "下级角色不可编辑上级角色的路由权限",
+            )
+
     def _toRoleVo(self, Row) -> RoleVO:
         """角色记录转 VO。"""
         return RoleVO(
diff --git a/legal-platform-frontend b/legal-platform-frontend
index ab61283..1c20a29 160000
--- a/legal-platform-frontend
+++ b/legal-platform-frontend
@@ -1 +1 @@
-Subproject commit ab612835798acdf8b9333461ea165d7f80a68557
+Subproject commit 1c20a2989fe1656aceed4f80f5461bba95959c95
diff --git a/tests/test_rule_write_scope.py b/tests/test_rule_write_scope.py
index 419926c..160f95b 100644
--- a/tests/test_rule_write_scope.py
+++ b/tests/test_rule_write_scope.py
@@ -216,6 +216,41 @@ def test_rbac_seed_cache_reuses_recent_route_map():
     assert service._get_cached_admin_seed_route_map() == route_map
 
 
+@pytest.mark.asyncio
+async def test_rbac_rejects_lower_role_editing_higher_role_permissions(monkeypatch):
+    service = RbacAdminServiceImpl()
+
+    async def fake_context(_current_user_id):
+        return {"is_super_admin": False, "max_role_priority": 50}
+
+    async def fake_role_row(_session, _role_id):
+        return {"id": 1, "priority": 90}
+
+    monkeypatch.setattr(service, "_getCurrentUserContext", fake_context)
+    monkeypatch.setattr(service, "_getRoleRow", fake_role_row)
+
+    with pytest.raises(LeauditException) as exc:
+        await service._assertCanManageTargetRole(None, 100, 1)
+
+    assert exc.value.status == StatusCodeEnum.HTTP_403_FORBIDDEN
+
+
+@pytest.mark.asyncio
+async def test_rbac_allows_super_admin_editing_higher_role_permissions(monkeypatch):
+    service = RbacAdminServiceImpl()
+
+    async def fake_context(_current_user_id):
+        return {"is_super_admin": True, "max_role_priority": 100}
+
+    async def fail_if_called(_session, _role_id):
+        raise AssertionError("super_admin should bypass target role lookup")
+
+    monkeypatch.setattr(service, "_getCurrentUserContext", fake_context)
+    monkeypatch.setattr(service, "_getRoleRow", fail_if_called)
+
+    await service._assertCanManageTargetRole(None, 100, 1)
+
+
 def test_permission_cache_is_shared_and_can_invalidate_user():
     first = PermissionServiceImpl()
     second = PermissionServiceImpl()