PYSEC-2026-2345
Apache Airflow: Authenticated users can bypass the `is_safe_url` check
At a glance
- Published
- Updated
- CVE
- CVE-2026-40961
- Aliases
- BIT-airflow-2026-40961, GHSA-6hcw-qqr8-pjj8
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · apache-airflow | introduced 0, fixed 3.2.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-40961 ADVISORY
- https://github.com/apache/airflow/pull/65557 WEB
- https://github.com/apache/airflow PACKAGE
- https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1q WEB
- http://www.openwall.com/lists/oss-security/2026/05/31/2 WEB
- https://pypi.org/project/apache-airflow PACKAGE
- https://github.com/advisories/GHSA-6hcw-qqr8-pjj8 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |