Privilege escalation in Red Hat Build Of Keycloak

CVE-2026-4629

A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions and inject the `realm-admin` role into generated tokens, resulting in privilege escalation and full administrative access to the realm.

EPSS: 0.003 (21.4th percentile) — read the EPSS interpretation.