CVE-2026-18207: Red Hat Build Of Keycloak

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the client policy enforcement mechanism of Keycloak. The issue occurs when the system checks group membership by name instead of a unique identifier. An attacker with client management privileges could bypass security policies by joining a group with a matching name in a different part of the group hierarchy, potentially allowing them to register or update clients without following required security hardening profiles.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-07-29. Last modified 2026-08-11.