HIGH
CVE-2026-15573
CVSS
8.1
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.
Weakness (CWE)
CWE-551
CWE-178
EPSS Score
0.32%
Probability of exploitation in next 30 days
24.9th percentile
References
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 Tracking, Vendor Advisory
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.