CVE-2026-40963: Apache Airflow: DAG authorization bypass on /ui/structure/structure_data
The structuredata endpoint in the Airflow UI returned external dependency graph nodes for linked Dags without checking whether the caller had read permission on those linked Dags. An authenticated UI/API user authorized for one Dag could enumerate linked Dag IDs and dependency metadata for other Dags they were not authorized to read. Affects deployments that rely on per-Dag read scoping to keep Dag dependency topology private across teams. Users are advised to upgrade to apache-airflow 3.2.2 or later.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
apache-airflowto a version that resolves this vulnerability.Fixed in 3.2.2Patch CVE-2026-40963
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40963?
The severity of CVE-2026-40963 is low, with a CVSS score of 3.1.
How do I fix CVE-2026-40963?
To fix CVE-2026-40963, apply the available patch from the Apache Airflow repository.
What does CVE-2026-40963 exploit in Apache Airflow?
CVE-2026-40963 exploits a DAG authorization bypass in the /ui/structure/structure_data endpoint.
Who is affected by CVE-2026-40963?
Authenticated Apache Airflow users who have read access to one DAG may exploit CVE-2026-40963 to access information about other linked DAGs.
When was CVE-2026-40963 published?
CVE-2026-40963 was published on May 31, 2026.