Redhat: >> Build Of Keycloak >> 26.5.2 Security Vulnerabilities
A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.
CVSS Score
8.1
EPSS Score
0.005
Published
2026-07-16