Vulnerability Description
Apache Airflow: the Core API logout endpoint revokes only a session token presented as the _token cookie. When a client logs out presenting its credential as an Authorization bearer header instead, the endpoint returns its normal logout response but revokes nothing, so the token remains valid until it expires. An attacker who already holds a copy of that token keeps the victim's access after the victim has logged out and believes the session ended; the default token lifetime is 24 hours and is configurable. Affects API clients that authenticate with a bearer token rather than the browser session cookie. The attacker must already possess a copy of a valid token; obtaining one is outside the scope of this issue, and no privileges beyond the victim's own are gained. Users of apache-airflow are recommended to upgrade to apache-airflow version 3.3.2 or later, which fixes the issue.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | >= 3.0.0, < 3.3.2 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/72649Issue TrackingVendor Advisory
- https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vrMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/09/21/5Mailing ListThird Party Advisory
FAQ
What is CVE-2026-86473?
CVE-2026-86473 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Apache Airflow: the Core API logout endpoint revokes only a session token presented as the _token cookie. When a client logs out presenting its credential as an Authorization bearer header instead, th...
How severe is CVE-2026-86473?
CVE-2026-86473 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-86473?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.