PT-2026-29732 · Red Hat · Red Hat Build Of Keycloak

Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-4636

Mitre

CVSS v3.1

8.1

High

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

A flaw was found in Keycloak. An authenticated user with the uma protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.

Fix

Weakness Enumeration

CWE-551

Related Identifiers

CVE-2026-4636

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-4636 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-4636 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2450251 · Note