Hi, OpenStack published a bunsh of CVEs at keystone. These five CVEs in OpenStack Keystone are all post-auth privilege escalation or scope expansion vulnerabilities. All Keystone releases supported by YAOOK are affected. For details of the particular exploitation flows, please consult the upstream advisory. The YAOOK authors consider CVE-2026-42999 to be the most severe one. It allows cross-project privilege escalation by anyone who can obtain a valid OpenStack token, effectively breaking tenant isolation and potentially allowing escalation to cloud admin privileges. The following images are vulnerable: * keystone images before 3.0.87 * yaook release before 2.3.0 If this image is used in your cluster for the keystone-api deployment, the cluster is vulnerable. The fixed image has been built in a private pipeline[1] which has been published alongside this advisory to prove the image provenance. We recommend to *immediately* add a YAOOK_OP_VERSIONS_OVERRIDE[2] variable to your Keystone operator container to pull the image before the YAOOK comprehensive release is ready. |operator: extraEnv: - name: YAOOK_OP_VERSIONS_OVERRIDE value: | { "registry.yaook.cloud/yaook/keystone-2023.2": "registry.yaook.cloud/yaook/keystone-2023.2:3.0.87", "registry.yaook.cloud/yaook/keystone-2024.1": "registry.yaook.cloud/yaook/keystone-2024.1:3.0.87", "registry.yaook.cloud/yaook/keystone-2024.2": "registry.yaook.cloud/yaook/keystone-2024.2:3.0.87", "registry.yaook.cloud/yaook/keystone-2025.1": "registry.yaook.cloud/yaook/keystone-2025.1:3.0.87", "registry.yaook.cloud/yaook/keystone-2025.2": "registry.yaook.cloud/yaook/keystone-2025.2:3.0.87" }| More info can be found in our security advisory[3]. Regards Stefan [1] https://gitlab.com/yaook-security/images/keystone/-/pipelines/2556551510 [2] https://docs.yaook.cloud/user/references/env-reference.html#envvar-YAOOK_OP_... [3] https://yaook.cloud/security-advisories-cve-2026-42998-43001-44394/ -- Stefan Hoffmann DevOps Engineer Cloud&Heat Technologies GmbH Königsbrücker Straße 96 | 01099 Dresden +49 351 479 367 36 stefan.hoffmann@cloudandheat.com |www.cloudandheat.com Green, Open, Efficient. Ihr Cloud-Service- und Cloud-Technologie-Provider aus Dresden. https://www.cloudandheat.com/ Commercial Register: District Court Dresden Register Number: HRB 30549 VAT ID No.: DE281093504 Managing Director: Nicolas Röhrs Authorized signatory: Dr. Marius Feldmann