CVE-2026-42359
CVE-2026-42359 · Apache Airflow: Authenticated RCE via XCom PATCH endpoint — XComUpdateBody missing FORBIDDEN_XCOM_KEYS validator
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A bug in Apache Airflow's XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer's deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.
CVSS 8.8 · Hoch · EPSS 0,6% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: python
Betroffene Produkte und Versionen
apache airflow
- Softwareversionen
- ≥ 3.2.0, < 3.2.2: Betroffen (semver)
Auf 3.2.2 aktualisieren
apache-airflow PyPI
- Softwareversionen
- 3.2.0
- 3.2.1
- 3.2.1rc1
- 3.2.1rc2
- 3.2.1rc3
- 3.2.2rc1
- 3.2.2rc2
- 3.2.2rc3
- Betroffene Versionsbereiche
- ECOSYSTEM: ≥ 3.2.0, < 3.2.2
Auf 3.2.2 aktualisieren