{"id":"CVE-2026-82311","title":"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","summary":"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 sessi…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-613"],"vendor":"apache","product":"apache-airflow-providers-fab","affected":["apache-airflow-providers-fab >= 2.4.2, < 3.9.0"],"patched":["apache-airflow-providers-fab 3.9.0"],"published":"2026-09-16","updated":"2026-09-18","sourceUpdated":"2026-09-18T14:28:43.283","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82311","references":[{"url":"https://github.com/apache/airflow/pull/72198","label":"security@apache.org"},{"url":"https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw","label":"security@apache.org"},{"url":"https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw?users@airflow.apache.org","label":"security@apache.org"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86462","label":"security@apache.org"}],"tags":["nvd","cve.org"],"epss":0.0095,"epssPercentile":0.59771,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-17T19:26:29.021619Z"},"ingestedAt":"2026-09-16T09:53:11.598Z","slug":"CVE-2026-82311","body":"## Overview\n\nApache 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.\n\n## Affected\n\n- `apache-airflow-providers-fab >= 2.4.2, < 3.9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `apache-airflow-providers-fab 3.9.0`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[{"seq":206552,"id":"CVE-2026-82311","ts":1789676926863,"field":"cvss","old":null,"new":"9.8"},{"seq":206551,"id":"CVE-2026-82311","ts":1789676926863,"field":"severity","old":"none","new":"critical"}]}