CVE-2026-15573
No fix known EPSS <1%CVSS 8.1
A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.
Products: Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.14, Red Hat build of Keycloak 26.6, Red Hat build of Keycloak 26.6.5, Red Hat Data Grid 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7