Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Apache-Airflow-Providers-Keycloak | >= 0.0.1, < 0.7.0 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/64114Issue TrackingPatch
- https://lists.apache.org/thread/kc0odpr70hbqhdb9ksnz42fkqz2xld9qMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/17/14Mailing ListThird Party Advisory
FAQ
What is CVE-2026-40948?
CVE-2026-40948 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 att...
How severe is CVE-2026-40948?
CVE-2026-40948 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40948?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Apache-Airflow-Providers-Keycloak.