diff --git a/airflow/api_connexion/endpoints/dag_endpoint.py b/airflow/api_connexion/endpoints/dag_endpoint.py
index 13d71c30ac579..3486244b39cc8 100644
--- a/airflow/api_connexion/endpoints/dag_endpoint.py
+++ b/airflow/api_connexion/endpoints/dag_endpoint.py
@@ -61,6 +61,7 @@ def get_dag(*, dag_id: str, session: Session = NEW_SESSION) -> APIResponse:
 
 
 @security.requires_access_dag("GET")
+@provide_session
 def get_dag_details(*, dag_id: str, session: Session = NEW_SESSION) -> APIResponse:
     """Get details of DAG."""
     dag: DAG = get_airflow_app().dag_bag.get_dag(dag_id)