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9.1

Apache Airflow logout does not revoke bearer token

CVE-2026-86473 · published 28 days ago
Summary

When users sign out of Apache Airflow using a bearer token in the Authorization header, the system only clears the browser cookie and leaves the token active until it expires (default 24 hours). This means anyone who already captured that token can keep accessing the system even after the user thinks they have logged out. Upgrade to Apache Airflow 3.3.2 or newer to ensure logout revokes all tokens.

What to do
  • Update apache-airflow to version 3.3.2.
  • Update airflow to version 3.3.2.
  • Update apache software foundation apache airflow to version 3.3.2 or later.
  • Update apache airflow to version 3.3.2 or later.
Affected software
Ecosystem VendorProductAffected versions
– apache software foundation apache airflow < 3.3.2
– apache airflow >= 3.0.0, < 3.3.2
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
PyPI – apache-airflow >= 3.0.0, < 3.3.2
Fix: upgrade to 3.3.2
Bitnami – airflow >= 3.0.0, < 3.3.2
Fix: upgrade to 3.3.2
Original advisory text
Apache Airflow: Logout ignores a presented Authorization bearer token, leaving it revocable only by expiry
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.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.1 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-613Insufficient Session Expiration
Timeline
Published21 Sep 2026
Updated19 Oct 2026
First seen21 Sep 2026
Sources
CVE-2026-86473 · NVD
CVE-2026-86473 · MITRE
CVE-2026-86473 · OSV
PYSEC-2026-3990 · OSV
BIT-airflow-2026-86473 · OSV
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