CVE-2026-90460: Openstack Keystone

High severity, CVSS 7.6. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in OpenStack Keystone before 29.0.3. Tokens obtained via delegated authentication methods (EC2 credentials, application credentials, OAuth1 access tokens, and trusts) are not blocked from creating, modifying, or deleting credentials via the /v3/credentials API. EC2-derived tokens can additionally read credential blobs, exposing TOTP MFA seeds and other secrets. Also, PATCH /v3/credentials does not validate the requested post-update project_id, allowing any delegated token to move a credential to an unauthorized project. All Keystone deployments using delegated authentication are affected.

Affected products

• Openstack Keystone: from 13.0.0, before 27.0.3 (fixed in 27.0.3); from 28.0.0, before 28.0.3 (fixed in 28.0.3); from 29.0.0, before 29.0.3 (fixed in 29.0.3)

Published 2026-09-11. Last modified 2026-09-22.