CVE-2026-15573

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 v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:50846	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50847	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50848	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50849	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-15573	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2499593	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:build_of_keycloak::::::::
	cpe:2.3:a:redhat:build_of_keycloak::::::::
	cpe: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:::::::*

History

No history.

Information

Published : 2026-08-05 15:16

Updated : 2026-08-31 10:16

NVD link : CVE-2026-15573

Mitre link : CVE-2026-15573

CVE.ORG link : CVE-2026-15573

JSON object : View

Products Affected

redhat

build_of_keycloak
single_sign-on
data_grid
jboss_enterprise_application_platform_expansion_pack

CWE

CWE-551

Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

CWE-178

Improper Handling of Case Sensitivity

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