CVE-2026-12388 — Keycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper
A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to manage how user information from external services is mapped to Keycloak users. An…
Published: 2026-06-30 · CVSS: 6.5 · CVSS 3.1
A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to manage how user information from external services is mapped to Keycloak users. An administrator with limited permissions to manage identity providers can exploit this flaw by creating a "Hardcoded Role" mapper that assigns high-level administrative roles (like realm-admin) to themselves or others. This allows a restricted administrator to bypass security checks and gain full control over the entire realm.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7