Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
Summary
| CVE | CVE-2026-15573 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-05 15:16:36 UTC |
| Updated | 2026-08-05 20:17:05 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.1 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Problem Types: CWE-178 | CWE-178 CWE-178 Improper Handling of Case Sensitivity
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | CNA | CVSS | 8.1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4.14-1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-22 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-22 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4.14 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4.14 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6.5-1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-11 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-11 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6.5 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6.5 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6.5 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Data Grid 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | Not specified | Not specified |
| CNA | Red Hat | Red Hat Single Sign-On 7 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:50846 | [email protected] | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-15573 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:50847 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:50848 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:50849 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Sanil Dulal for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-06T23:22:09.000Z | Reported to Red Hat. |
| CNA | 2026-08-05T02:02:00.000Z | Made public. |
There are currently no legacy QID mappings associated with this CVE.