PT-2026-102297

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...

CVE-2026-59242: Deserialization of Untrusted Data

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 ...

PT-2026-105506

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...

CVE-2026-42359

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. "returnvalue" that the matching POST endpoint already validated against "FORBIDDENXCOMKEYS". The...

CVE-2026-42359: Deserialization of Untrusted Data

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. returnvalue that the matching POST endpoint already validated against FORBIDDENXCOMKEYS. The...

Internet Bug Bounty: Pickle deserialization vulnerability in XComs

CVE-2023-50943: Apache Airflow: Potential pickle deserialization vulnerability in XComs Severity: low Affected versions: - Apache Airflow before 2.8.1 Description: Apache Airflow, versions before 2.8.1, have a vulnerability that allows a potential attacker to poison the XCom data by bypassing the...