Description
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone application credential authentication plugin does not verify that the user supplied in the authentication request matches the owner of the application credential. An attacker can authenticate with their own application credential ID and secret while specifying a different user's name and domain in the request body. Keystone issues a token attributed to the victim user. The impersonated token is project-scoped and carries the intersection of the application credential's roles and the victim's actual roles on the project. This enables audit evasion, reading the victim's credentials, and acting as the victim within shared projects.
Problem types
CWE-863 Incorrect Authorization
Product status
14.0.0 (semver) before 27.0.2
28.0.0 (semver) before 28.0.2
29.0.0 (semver) before 29.0.2
References
bugs.launchpad.net/keystone/+bug/2148477
security.openstack.org/ossa/OSSA-2026-015.html