CVE-2026-15573

Description

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.

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Produits concernés

• 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
• Redhat build of keycloak
• Redhat data grid
• Redhat jboss enterprise application platform expansion pack
• Redhat single sign-on

Scores CVSS

Faiblesses (CWE)

• CWE-551
• CWE-178

Références

• https://access.redhat.com/errata/RHSA-2026:50846 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:50847 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:50848 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:50849 Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-15573 Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2499593 Issue TrackingVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories