CVE-2026-25917: Apache Airflow: API extra-links triggers XCom deserialization/class instantiation (Airflow 3.1.5)

[Rahul Vats <rahulvats () apache org>]

Severity: low 

Affected versions:

- Apache Airflow (apache-airflow) before 3.2.0

Description:

Dag Authors, who normally should not be able to execute code in the webserver context could craft XCom payload causing 
the webserver to execute arbitrary code. Since Dag Authors are already highly trusted, severity of this issue is Low.

Users are recommended to upgrade to Apache Airflow 3.2.0, which fixes the issue.

Credit:

Mahammad Huseynkhanli (finder)
Amogh Desai (remediation developer)

References:

https://github.com/apache/airflow/pull/61641
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-25917