Authorization bypass through user-controlled key in Red Hat build of Keycloak - CVE-2026-14614
Published: September 11, 2026
Vulnerability identifier: #VU148989
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-14614
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify the contents of security tokens issued to end users.
The vulnerability exists due to a missing authorization check on referenced client scopes in the ClientResource component when assigning client scopes through the admin REST API. A remote user can attach or remove hidden client scopes to modify the contents of security tokens issued to end users.
Fine-Grained Admin Permissions v2 must be enabled, and exploitation requires knowledge of internal resource identifiers.
Affected software
Red Hat build of Keycloak
How to mitigate CVE-2026-14614
Install security update from vendor's website.
Red Hat build of Keycloak - update to 26.6.5