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…
High CVSS 8.1
Summary
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.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Sources
- NVD DATABASE
Original Links
- https://access.redhat.com/security/cve/CVE-2026-1609 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2435257 Issue Tracking
- https://github.com/keycloak/keycloak/issues/46144 Issue Tracking
- https://github.com/keycloak/keycloak/releases/tag/26.5.3 Release Notes
- https://access.redhat.com/security/cve/CVE-2026-1609 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2435257 Issue Tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.json Vendor Advisory
Timeline
- nvd_ingest NVD