CVE-2026-15573
8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.14-1 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-22 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-22 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.5-1 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-11 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-11 < * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://access.redhat.com/errata/RHSA-2026:50846
- https://access.redhat.com/errata/RHSA-2026:50847
- https://access.redhat.com/errata/RHSA-2026:50848
- https://access.redhat.com/errata/RHSA-2026:50849
- https://access.redhat.com/security/cve/CVE-2026-15573
- https://bugzilla.redhat.com/show_bug.cgi?id=2499593
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