CVE-2026-82310: Apache Airflow FAB provider: FAB auth manager: deactivated users retain and renew Core API JWT access

[Vincent Beck <vincbeck () apache org>]

Severity: moderate 

Affected versions:

- Apache Airflow FAB provider (apache-airflow-providers-fab) 2.0.0 before 3.9.0

Description:

Apache Airflow FAB provider: deactivating a user account does not stop tokens issued to that account before 
deactivation. Password authentication correctly rejects the disabled account, but the Core API continues to accept an 
existing, unexpired token naming it, and lets that token mint a replacement — so the account keeps its role-scoped 
access indefinitely after an administrator has disabled it. The user replays their own legitimate credential; no 
signature forgery or privilege escalation is involved, and the access stays within the roles the account already held.

Affects deployments using Airflow 3 with the FAB auth manager and Core API token authentication, where an administrator 
deactivates an account whose row remains in the database and whose previously issued token has not expired. The trigger 
is administrative deactivation as a containment action, which silently fails to contain.

Users of apache-airflow-providers-fab are recommended to upgrade to version 3.9.0 or later, which rejects tokens naming 
a deactivated account.

Credit:

Mayank Jangid (OpenSec) (finder)
Jarek Potiuk (remediation developer)

References:

https://github.com/apache/airflow/pull/72199
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-82310