{"schema_version": "1.6.1", "id": "CVE-2026-82311", "summary": "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.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "2.4.2"}, {"fixed": "3.9.0"}]}]}], "references": [{"type": "WEB", "url": "https://github.com/apache/airflow/pull/72198"}, {"type": "WEB", "url": "https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw?users@airflow.apache.org"}, {"type": "WEB", "url": "https://www.cve.org/CVERecord?id=CVE-2026-86462"}, {"type": "WEB", "url": "https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw"}]}