CVE-2026-11986: Red Hat Build Of Keycloak

Medium severity, CVSS 4.9. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control.

Affected products

• Red Hat Build Of Keycloak: from 26.6, before 26.6.5 (fixed in 26.6.5)

Published 2026-06-11. Last modified 2026-08-11.