CVE-2026-82311
Apache Airflow FAB provider: FAB password reset never invalidates sessions: string/int _user_id comparison is always false
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.
INFO
Published Date :
Sept. 16, 2026, 9:17 a.m.
Last Modified :
Sept. 18, 2026, 2:28 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade the FAB provider to version 3.9.0 or later.
- Ensure FAB auth manager uses database session backend.
- Verify password reset commands function correctly post-upgrade.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-82311.
| URL | Resource |
|---|---|
| https://github.com/apache/airflow/pull/72198 | Patch Vendor Advisory |
| https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw | Mailing List Vendor Advisory |
| https://lists.apache.org/thread/[email protected] | Mailing List |
| https://www.cve.org/CVERecord?id=CVE-2026-86462 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-82311 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-82311
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-82311 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-82311 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 18, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:apache:apache-airflow-providers-fab:*:*:*:*:*:*:*:* versions from (including) 2.4.2 up to (excluding) 3.9.0 Added Reference Type Apache Software Foundation: https://github.com/apache/airflow/pull/72198 Types: Patch, Vendor Advisory Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw Types: Mailing List, Vendor Advisory Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/[email protected] Types: Mailing List Added Reference Type Apache Software Foundation: https://www.cve.org/CVERecord?id=CVE-2026-86462 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added SSVC {'id': 'CVE-2026-82311', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-17T19:26:29.021619Z'} -
CVE Modified by [email protected]
Sep. 16, 2026
Action Type Old Value New Value Added Reference https://lists.apache.org/thread/[email protected] -
New CVE Received by [email protected]
Sep. 16, 2026
Action Type Old Value New Value 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. Added CWE CWE-613 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/82xxx/CVE-2026-82311.json">CVE-2026-82311</a> Added Reference https://github.com/apache/airflow/pull/72198 Added Reference https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw Added Reference https://www.cve.org/CVERecord?id=CVE-2026-86462