[ CVE-2026-9800 · Published 25 Jun 2026 ]
Keycloak vulnerable to authorization bypass via incorrect uri comparison
CVSS 8.1
EPSS <1%Fix available
[ Description ]Official description
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
[ Fixes ]Fixes and patches
- org.keycloak:keycloak-services 26.6.4Fixed version · GitHub Advisories · maven package org.keycloak:keycloak-services: upgrade to 26.6.4 or later (affected < 26.6.4)
- org.keycloak:keycloak-policy-enforcer 26.0.10Fixed version · GitHub Advisories · maven package org.keycloak:keycloak-policy-enforcer: upgrade to 26.0.10 or later (affected < 26.0.10)
[ Packages ]Affected open-source packages
- org.keycloak:keycloak-services mavenAffected < 26.6.4 · fixed in 26.6.4 · GHSA-f5p5-6xmx-p252
- org.keycloak:keycloak-policy-enforcer mavenAffected < 26.0.10 · fixed in 26.0.10 · GHSA-f5p5-6xmx-p252
[ References ]References
- access.redhat.com/errata/RHSA-2026:30049vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:30050vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:30083vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:30084vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:36002vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:36013vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:50846vendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2026:50847vendor-advisoryx_refsource_REDHAT
- access.redhat.com/security/cve/CVE-2026-9800vdb-entryx_refsource_REDHAT
- bugzilla.redhat.com/show_bug.cgiissue-trackingx_refsource_REDHAT