CVE-2026-59242

Description

Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal payload through `BaseXCom.deserialize_value` without the `_check_forbidden_xcom_keys` guard, allowing an authenticated API user with XCom write-and-read access to instantiate arbitrary `airflow.*` classes on the API server (CWE-502). An authenticated user who can write an XCom value and then read it back with `deserialize=true` triggers the unsafe instantiation. Users are advised to upgrade to apache-airflow 3.3.1 or later, which rejects reserved XCom serialization keys submitted as JSON string literals.

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Produits concernés

• Apache Software Foundation Apache Airflow
• Apache airflow

Scores CVSS

Faiblesses (CWE)

• CWE-502

Références

• https://github.com/apache/airflow/pull/69378 Issue TrackingPatch
• https://lists.apache.org/thread/dm0520yhh4mn7qknyoh45r2w6c5qg2mg Mailing ListVendor Advisory
• http://www.openwall.com/lists/oss-security/2026/08/12/6 Mailing ListThird Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories