Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-08-05T02:02:00 keycloak-services: keycloak-services: Authorization bypass via unnormalized URI matching in PathMatcher 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

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.

Red Hat Product Security has rated this vulnerability as having a security impact of Important. This issue allows authenticated users to bypass fine-grained authorization controls by exploiting a lack of URI normalization in the PathMatcher utility. While authentication is required, the ability to bypass explicit "Deny" policies and access restricted resources poses a significant risk to the confidentiality and integrity of the protected system. Red Hat would like to thank Sanil Dulal for reporting this issue. Red Hat build of Keycloak 26.4 2026-08-05T00:00:00Z RHSA-2026:50847 rhbk/keycloak-operator-bundle:26.4.14-1 Red Hat build of Keycloak 26.4 2026-08-05T00:00:00Z RHSA-2026:50847 rhbk/keycloak-rhel9:26.4-22 Red Hat build of Keycloak 26.4 2026-08-05T00:00:00Z RHSA-2026:50847 rhbk/keycloak-rhel9-operator:26.4-22 Red Hat build of Keycloak 26.4.14 2026-08-05T00:00:00Z RHSA-2026:50846 keycloak-services Red Hat build of Keycloak 26.4.14 2026-08-05T00:00:00Z RHSA-2026:50846 rhbk-openshift-rhel9/rhbk-openshift-rhel9 Red Hat build of Keycloak 26.6 2026-08-05T00:00:00Z RHSA-2026:50849 rhbk/keycloak-operator-bundle:26.6.5-1 Red Hat build of Keycloak 26.6 2026-08-05T00:00:00Z RHSA-2026:50849 rhbk/keycloak-rhel9:26.6-11 Red Hat build of Keycloak 26.6 2026-08-05T00:00:00Z RHSA-2026:50849 rhbk/keycloak-rhel9-operator:26.6-11 Red Hat build of Keycloak 26.6.5 2026-08-05T00:00:00Z RHSA-2026:50848 keycloak-services Red Hat build of Keycloak 26.6.5 2026-08-05T00:00:00Z RHSA-2026:50848 rhbk/keycloak-rhel9 Red Hat build of Keycloak 26.6.5 2026-08-05T00:00:00Z RHSA-2026:50848 rhbk-openshift-rhel9/rhbk-openshift-rhel9 Red Hat Data Grid 8 Affected keycloak-services Red Hat JBoss Enterprise Application Platform Expansion Pack Affected keycloak-services Red Hat Single Sign-On 7 Fix deferred keycloak-services https://www.cve.org/CVERecord?id=CVE-2026-15573 https://nvd.nist.gov/vuln/detail/CVE-2026-15573