diff --git a/providers/fab/src/airflow/providers/fab/auth_manager/fab_auth_manager.py b/providers/fab/src/airflow/providers/fab/auth_manager/fab_auth_manager.py
index f0c4eefab776b..4d3c1dc3c9ee8 100644
--- a/providers/fab/src/airflow/providers/fab/auth_manager/fab_auth_manager.py
+++ b/providers/fab/src/airflow/providers/fab/auth_manager/fab_auth_manager.py
@@ -647,6 +647,9 @@ def _get_user_permissions(user: User):
 
         :meta private:
         """
+        # If the user gets deleted while being logged in
+        if not user:
+            return []
         return getattr(user, "perms") or []
 
     def _get_root_dag_id(self, dag_id: str) -> str: