RHSA-2026:50846Vendor advisory
https://access.redhat.com/errata/RHSA-2026:50846 CVE-2026-15573
HIGH
Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
Record summary
CVE-2026-15573 has a selected CVSS score of 8.1 (high).
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 5, 2026 · Source: CVE List
Affected products and versions
Showing 12 of 14| Product | Source | Version range | Status |
|---|---|---|---|
Default status: affected | CVE List | Version data not supplied | |
Red Hat JBoss Enterprise Application Platform Expansion PackBrowse Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Packkeycloak-servicesDefault status: affected | CVE List | Version data not supplied | |
Default status: affected | CVE List | Version data not supplied | |
Red Hat build of Keycloak 26.4Browse Red Hat / Red Hat build of Keycloak 26.4rhbk/keycloak-operator-bundleDefault status: affected | CVE List | 26.4.14-1 to < * | unaffected |
Default status: affected | CVE List | 26.4-22 to < * | unaffected |
Red Hat build of Keycloak 26.4Browse Red Hat / Red Hat build of Keycloak 26.4rhbk/keycloak-rhel9-operatorDefault status: affected | CVE List | 26.4-22 to < * | unaffected |
Red Hat build of Keycloak 26.4.14Browse Red Hat / Red Hat build of Keycloak 26.4.14keycloak-servicesDefault status: unaffected | CVE List | Version data not supplied | |
Red Hat build of Keycloak 26.4.14Browse Red Hat / Red Hat build of Keycloak 26.4.14rhbk-openshift-rhel9/rhbk-openshift-rhel9Default status: unaffected | CVE List | Version data not supplied | |
Red Hat build of Keycloak 26.6Browse Red Hat / Red Hat build of Keycloak 26.6rhbk/keycloak-operator-bundleDefault status: affected | CVE List | 26.6.5-1 to < * | unaffected |
Default status: affected | CVE List | 26.6-11 to < * | unaffected |
Red Hat build of Keycloak 26.6Browse Red Hat / Red Hat build of Keycloak 26.6rhbk/keycloak-rhel9-operatorDefault status: affected | CVE List | 26.6-11 to < * | unaffected |
Default status: unaffected | CVE List | Version data not supplied | |
References
7RHSA-2026:50847Vendor advisory
https://access.redhat.com/errata/RHSA-2026:50847 RHSA-2026:50848Vendor advisory
https://access.redhat.com/errata/RHSA-2026:50848 RHSA-2026:50849Vendor advisory
https://access.redhat.com/errata/RHSA-2026:50849 access.redhat.comvdb entry
https://access.redhat.com/security/cve/CVE-2026-15573 RHBZ#2499593issue tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2499593 nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-15573