CVE-2026-4282: Red Hat Build Of Keycloak

High severity, CVSS 7.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified; version 26.2 only; version 26.2.15 only; version 26.4 only; version 26.4.11 only

Published 2026-04-02. Last modified 2026-07-15.