{"id":"CVE-2026-82311","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-82311","summary":"Apache Airflow FAB provider: FAB password reset never invalidates sessions: string/int _user_id comparison is always false","details":"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.\n\nAffects 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.\n\napache-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.\n\nUsers of apache-airflow-providers-fab are recommended to upgrade to version 3.9.0 or later, which compares the identifiers consistently.","published":"2026-09-16T09:00:38.459Z","modified":"2026-09-18T03:48:30.776901327Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/apache/airflow/pull/72198","label":"apache/airflow#72198"},"references":[{"type":"WEB","url":"https://pypi.python.org"},{"type":"WEB","url":"https://www.cve.org/CVERecord?id=CVE-2026-86462"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82311.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw?users@airflow.apache.org"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82311"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/72198"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T03:48:30.776901327Z"}}