What is CVE-2026-86462?

CVE-2026-86462 is a critical-severity vulnerability in Apache Apache-Airflow-Providers-Fab, classified under Insufficient Session Expiration. CVSS score: 9.1/10. Published 2026-09-16.

How severe is CVE-2026-86462?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Apache Apache-Airflow-Providers-Fab

CVE-2026-86462

Apache Airflow FAB provider: changing a user's password through the Admin user-edit PATCH endpoint does not invalidate that user's existing database-backed sessions. An attacker who already holds a copy of the victim's session cookie keeps full access as that user after the password change, so the password reset does not evict them. Affects deployments using the FAB auth manager with database-backed sessions; an administrator (or the user themselves) performing a routine password change is the trigger, and no attacker interaction with the endpoint is needed. This is a second, independent route to the outcome addressed by CVE-2026-82311, which corrected an identifier comparison in the session-invalidation helper. That fix does not repair this endpoint, because the PATCH path never calls the helper at all. Deployments that applied the CVE-2026-82311 fix must also upgrade for this one. Users of apache-airflow-providers-fab are recommended to upgrade to version 3.9.0 or later, which fixes the issue.

Published 2026-09-16 · last modified 2026-09-18.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (57.5th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

github.com/apache/airflow/pull/72657 (Patch, patch, Vendor Advisory)
lists.apache.org/thread/7sr4sggfv5fhhl3qgphcq0rlhg81do1s (vendor-advisory, Mailing List, Vendor Advisory)
www.cve.org/CVERecord (related, US Government Resource)
lists.apache.org/thread/7sr4sggfv5fhhl3qgphcq0rlhg81do1s (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-86462?: CVE-2026-86462 is a critical-severity vulnerability in Apache Apache-Airflow-Providers-Fab, classified under Insufficient Session Expiration. CVSS score: 9.1/10. Published 2026-09-16.
How severe is CVE-2026-86462?: Critical severity. CVSS v3 base score is 9.1 out of 10.