CVE-2026-4628: Red Hat Build Of Keycloak

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-03-23. Last modified 2026-06-17.