CVE-2026-97404
CriticalCVSS 9.2Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
In OpenStack Zaqar before 22.0.2, the 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.
Risk Assessment
An unauthenticated attacker who knows a project's UUID can gain full access to that project's queues and messages, and in some cases perform administrative operations. This can lead to data leakage, modification, or loss of service availability.
Recommendation
Update OpenStack Zaqar to version 22.0.2 or later. If possible, consider switching to the websocket transport or restricting network access to the WSGI interface.
Other vulnerabilities in OpenStack Zaqar
See all- CVE-2026-107363Medium
In OpenStack Zaqar before 23.0.1, the WebSocket transport fails to bind the project identifier in subsequent requests to the project authenticated by the Keystone token. An authenticated user with a valid token for one project may substitute another project's UUID to enumerate, inspect, create, or delete queues belonging to that project, resulting in unauthorized disclosure, modification, or loss of queue data. Only deployments using the WebSocket transport with Keystone authentication are affected.
- CVE-2026-66139Medium
OpenStack Zaqar through version 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS