CVE-2026-15573

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.

Score
CVSS 3.1 8.1 High
Status
Modified - secalert@redhat.com
Published
2026-08-05
Last modified
2026-08-31
Weaknesses
CWE-178, CWE-551

Affected products

References

 
 
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