CVE-2026-15573Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
Updated under an hour ago ()
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It affects Red Hat build of Keycloak 26.4 and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-551, CWE-178
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat build of Keycloak 26.4 redhat:build_keycloak | from 26.4.14-1 not affected | CNA record |
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid | 8 | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp | Versions not stated | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
redhat build_of_keycloak redhat:build_of_keycloak | from 26.4 before 26.4.14; from 26.6 before 26.6.5 | NVD |
redhat data_grid redhat:data_grid | 8.0 | NVD |
redhat jboss_enterprise_application_platform_expansion_pack redhat:jboss_enterprise_application_platform_expansion_pack | all versions | NVD |
redhat single_sign-on redhat:single_sign-on | 7.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:50846vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50847vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50848vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50849vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-15573vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2499593issue-tracking, x-refsource-redhat, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.