CVE-2026-40961: Apache Airflow

High severity, CVSS 7.2. EPSS: 0.8% chance of exploitation in the next 30 days.

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 products

• Apache Airflow: from 3.0.0, before 3.2.2 (fixed in 3.2.2)

Published 2026-06-01. Last modified 2026-07-21.