Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | >= 3.0.0, < 3.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/65557Issue TrackingPatch
- https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1qMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/31/2Mailing ListThird Party Advisory
FAQ
What is CVE-2026-40961?
CVE-2026-40961 is a vulnerability with a CVSS score of 7.2 (HIGH). 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-c...
How severe is CVE-2026-40961?
CVE-2026-40961 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40961?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.