CVE-2026-15573

high Red Hat
CVSS v3 Base Score
8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Published: August 5, 2026 (32 days ago)
Last Modified: August 5, 2026
Vendor: Red Hat
Fix Available: ✓ Yes
Source: REDHAT

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.

Affected Products

Red Hat Data Grid 8Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat Single Sign-On 7Red Hat build of Keycloak 26.4Red Hat build of Keycloak 26.4.14Red Hat build of Keycloak 26.6Red Hat build of Keycloak 26.6.5

Fix Status

✅ Fix Available

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov