CVE-2026-40961

Description

A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the `is_safe_url` check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deployment operators can place Airflow behind a reverse proxy that strips off-domain `next=` query parameters before they reach the login endpoint.

References

• https://github.com/apache/airflow/pull/65557
• https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1q
• http://www.openwall.com/lists/oss-security/2026/05/31/2