Apache Airflow: Authenticated users can bypass the `is_safe_url` check
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-40961US | — | — | ||
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 dom… | ||||
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references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/05/31/2WEB
- https://github.com/advisories/GHSA-6hcw-qqr8-pjj8ADVISORY
- https://github.com/apache/airflowPACKAGE
- https://github.com/apache/airflow/pull/65557WEB
- https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1qWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-40961ADVISORY
- https://pypi.org/project/apache-airflowPACKAGE
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