Apache Airflow FAB provider: resetting a user's password does not delete that user's existing database-backed sessions, despite documented behaviour that it does. The cleanup compares the string identifier Flask-Login stores in the session against the user's integer database identifier, so the comparison never matches and no session is removed. An attacker who already holds a copy of the victim's session cookie keeps access as that user after the password change, so the reset does not evict them. Affects deployments using the FAB auth manager with `[fab] session_backend=database`. The trigger is an administrator (or the user) running the supported password-reset command as a containment action after a session cookie has been compromised; the secure-cookie backend is out of scope, as it documents that it cannot centrally delete sessions. apache-airflow-providers-fab 3.9.0 also fixes CVE-2026-86462, a second, independent route to the same outcome via the Admin user-edit endpoint; a single upgrade closes both. Users of apache-airflow-providers-fab are recommended to upgrade to version 3.9.0 or later, which compares the identifiers consistently.
History

Fri, 18 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache apache-airflow-providers-fab
CPEs cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:*
Vendors & Products Apache apache-airflow-providers-fab

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 15:00:00 +0000


Wed, 16 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache airflow Fab Provider
Vendors & Products Apache
Apache airflow Fab Provider

Wed, 16 Sep 2026 09:15:00 +0000

Type Values Removed Values Added
Description Apache Airflow FAB provider: resetting a user's password does not delete that user's existing database-backed sessions, despite documented behaviour that it does. The cleanup compares the string identifier Flask-Login stores in the session against the user's integer database identifier, so the comparison never matches and no session is removed. An attacker who already holds a copy of the victim's session cookie keeps access as that user after the password change, so the reset does not evict them. Affects deployments using the FAB auth manager with `[fab] session_backend=database`. The trigger is an administrator (or the user) running the supported password-reset command as a containment action after a session cookie has been compromised; the secure-cookie backend is out of scope, as it documents that it cannot centrally delete sessions. apache-airflow-providers-fab 3.9.0 also fixes CVE-2026-86462, a second, independent route to the same outcome via the Admin user-edit endpoint; a single upgrade closes both. Users of apache-airflow-providers-fab are recommended to upgrade to version 3.9.0 or later, which compares the identifiers consistently.
Title Apache Airflow FAB provider: FAB password reset never invalidates sessions: string/int _user_id comparison is always false
Weaknesses CWE-613
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-09-16T09:00:38.459Z

Updated: 2026-09-17T19:27:29.873Z

Reserved: 2026-08-28T12:58:33.571Z

Link: CVE-2026-82311

cve-icon Vulnrichment

Updated: 2026-09-17T19:27:23.895Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-16T09:17:06.430

Modified: 2026-09-18T14:28:43.283

Link: CVE-2026-82311

cve-icon Redhat

No data.