# CVE-2026-86473: Apache Airflow: Logout ignores a presented Authorization bearer token, leaving it revocable only by expiry

Status: published. Published: 2026-09-21. Updated: 2026-11-03.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: apache) — https://github.com/apache/airflow/pull/72649

## Affected products and versions

- Apache Software Foundation / Apache Airflow (apache-airflow-core): ≥ 3.0.0; < 3.3.2 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 3.1: 9.1 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: 0.75% as of 2026-11-02; percentile 54.87%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-613

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/apache/airflow/pull/72649 (CNA: apache; patch)

- https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vr (CNA: apache; vendor-advisory)

- http://www.openwall.com/lists/oss-security/2026/09/21/5 (ADP: CVE)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-86473; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-86473; retrieved 2026-11-03; source updated Not reported

Revision: caa362e99899f4a83288b3fd808820742f5a2bf7edc3b3e54f133c3f4bd4729b

Canonical: https://y2.dev/cve/CVE-2026-86473

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