CVE-2026-59242

Apache Airflow vulnerability CVE-2026-59242: The XCom GET /api/v2/{...}/xcomEntries/{key}?deserialize=true endpoint can deserialize a string-literal payload via BaseXCom.deserialize_value without the _check_forbidden_xcom_keys guard, enabling an authenticated API user with XCom write-and-read acc...

CVE-2026-59242 Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint

Apache Airflow's XCom GET /api/v2/.../xcomEntries/key?deserialize=true endpoint passed a string-literal payload through BaseXCom.deserializevalue without the checkforbiddenxcomkeys guard, allowing an authenticated API user with XCom write-and-read access to instantiate arbitrary airflow. classes ...