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9.1
CVE-2026-86473: Apache Airflow logout does not revoke bearer token
CVE-2026-86473 · published 4 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 software foundation apache airflow to version 3.3.2 or later.
- Update apache airflow to version 3.3.2 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| apache software foundation | apache airflow | < 3.3.2 |
| apache | airflow |
>= 3.0.0, < 3.3.2 cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* |
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.
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
- https://github.com/apache/airflow/pull/72649 Issue Tracking Vendor Advisory
- https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vr Mailing List Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/09/21/5 Mailing List Third Party Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86473... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-86473 Vendor Advisory
- https://pypi.python.org URL
Severity
9.1
Critical
Exploitation
EPSS <1%
Type
CWE-613Insufficient Session Expiration
Timeline
Published21 Sep 2026
Updated25 Sep 2026
First seen21 Sep 2026
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