---
title: "CVE-2026-82311: Apache Airflow FAB provider - Authentication Bypass"
description: "Apache Airflow FAB provider before 3.9.0 contains a broken authentication caused by inconsistent session identifier comparison in database-backed sessions, letting attackers with stolen session cookies maintain access after password reset, exploit requires use of FAB auth manager with database session backend."
url: https://panop.io/threat-heartbeat/CVE-2026-82311/
---

# CVE-2026-82311 Apache Airflow FAB provider - Authentication Bypass

Apache Airflow FAB provider before 3.9.0 contains a broken authentication caused by inconsistent session identifier comparison in database-backed sessions, letting attackers with stolen session cookies maintain access after password reset, exploit requires use of FAB auth manager with database session backend.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.98% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-82311)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

16 September 2026

Updated

15 October 2026

Weakness

[CWE-613](https://cwe.mitre.org/data/definitions/613.html)

## Vendor fix

Upgrade to apache-airflow-providers-fab version 3.9.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-82311](https://nvd.nist.gov/vuln/detail/CVE-2026-82311)
- [https://github.com/apache/airflow/pull/72198](https://github.com/apache/airflow/pull/72198)
- [https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw](https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw)
- [https://www.cve.org/CVERecord?id=CVE-2026-86462](https://www.cve.org/CVERecord?id=CVE-2026-86462)
- [https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw?users@airflow.apache.org](https://lists.apache.org/thread/mmplwl93shy615shkpp9p4fzyjvr4yqw?users@airflow.apache.org)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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