Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Keycloak / Keycloak | affected 26.5.0 before 26.5.3 |
| Red Hat / Red Hat JBoss Enterprise Application Platform 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
CWE
CWE-284
References
- https://access.redhat.com/security/cve/CVE-2026-1609
- https://bugzilla.redhat.com/show_bug.cgi?id=2435257
- https://github.com/keycloak/keycloak/issues/46144
- https://github.com/keycloak/keycloak/releases/tag/26.5.3
ADP enrichment
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.
No English description supplied.
No references supplied.