Quick answers
- Is CVE-2026-86462 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86462 being exploited in the wild.
- How severe is CVE-2026-86462?
- Critical severity, with a CVSS score of 9.1, published 16 September 2026.
- Which products and versions are affected?
- Apache Airflow FAB provider before 3.9.0.
- Is there a fix for CVE-2026-86462?
- A patch was published on 2026-09-09: Fix merged in apache/airflow PR #72657 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-86462 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-86462?
- Check whether you run Apache-Airflow-Providers-Fab. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a session-invalidation bypass in the Admin user-edit PATCH endpoint (`PATCH /auth/fab/v1/users/{username}`) of the apache-airflow-providers-fab library. When a user's password is updated through this endpoint, the code changes the password hash and saves the user record but never calls the session-invalidation helper function that would terminate existing database-backed sessions. An attacker with a previously obtained session cookie can continue using that cookie to authenticate as the victim user after their password is reset. This is a database-backed sessions issue affecting deployments using the FAB auth manager. The fix requires upgrading to apache-airflow-providers-fab 3.9.0 or later, which adds session invalidation to the PATCH endpoint logic.
Affected products
- Apache Airflow FAB provider before 3.9.0
Timeline
- 2026-09-16: disclosed
- 2026-09-09: patched: Fix merged in apache/airflow PR #72657