Vulnerability Report

CVE-2026-15573

Title: Keycloak Authorization Services URI Normalization Bypass

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-15573.

CWE Category NVD-CWE-noinfo

Published Date Aug 05, 2026

Modified Date Aug 31, 2026

Exploit Status Not Found

Score 8.1 CVSS v3.1

Exploit Probability (EPSS)

0.46%

Vulnerability Summary

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.

Impacted Vendors

redhat 4

pivotal 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-15573 https://bugzilla.redhat.com/show_bug.cgi?id=2499593

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns