PT-2026-53859 · Red Hat · Red Hat Build Of Keycloak

Published 2026-06-30 · Updated 2026-06-30 · CVE-2026-12388

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

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.

Fix

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

CVE-2026-12388

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-12388 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-12388 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2489140 · Note