CVE-2026-97404 Auth bypass in Zaqar
Unauthenticated attackers can bypass Keystone authentication to read, modify, or delete project queues and messages in OpenStack Zaqar WSGI deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97404?
CVE-2026-97404 is a critical authentication bypass vulnerability in OpenStack Zaqar, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In OpenStack Zaqar before 22.0.2, WSGI transport mishandles the URL-Signature header. By sending a request with an empty URL-Signature header, an unauthenticated remote attacker who knows a target project's UUID may bypass both Keystone authentication and pre-signed URL verification, resulting in the ability to read, enumerate, create, and delete that project's queues, messages, claims, and subscriptions. By additionally claiming an administrative role, the attacker may also perform administrative operations, such as managing pools and flavors in admin_mode deployments. Only deployments using the WSGI transport with an authentication strategy configured are affected; the websocket transport is not affected.
Weakness: CWE-348
Which versions are affected by CVE-2026-97404?
How do I fix CVE-2026-97404?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-97404 being exploited?
There is no known exploitation of CVE-2026-97404 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-97404, GHSA-j2hp-rfqr-h9c7, UBUNTU-CVE-2026-97404.