CVE-2026-40948: Apache Apache-Airflow-Providers-Keycloak

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.

Affected products

• Apache Apache-Airflow-Providers-Keycloak: from 0.0.1, before 0.7.0 (fixed in 0.7.0)

Published 2026-04-18. Last modified 2026-06-17.