8.1High
CVE-2026-15573Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| build keycloak | 26.4 | — | |
| build keycloak | 26.6 | — | |
| redhat | build of keycloak | 26.4 – < 26.4.14 | |
| redhat | data grid | 8.0 | |
| redhat | jboss enterprise application platform expansion pack | — | |
| Red Hat | Red Hat build of Keycloak 26.4 | all versions | |
| Red Hat | Red Hat build of Keycloak 26.4.14 | — | |
| Red Hat | Red Hat build of Keycloak 26.6 | all versions | |
| Red Hat | Red Hat build of Keycloak 26.6.5 | — | |
| Red Hat | Red Hat Data Grid 8 | all versions | |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — | |
| Red Hat | Red Hat Single Sign-On 7 | all versions | |
| redhat | single sign-on | 7.0 |
References and patches
- RHSA-2026:50846 vendor-advisoryVendor Advisory
- RHSA-2026:50847 vendor-advisoryVendor Advisory
- RHSA-2026:50848 vendor-advisoryVendor Advisory
- RHSA-2026:50849 vendor-advisoryVendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-15573 vdb-entryVendor Advisory
- RHBZ#2499593 issue-trackingIssue TrackingVendor Advisory
CPE matches (NVD) (5)
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.4 < 26.4.14cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.6 < 26.6.5cpe:2.3:a:redhat:data_grid:8.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*