CVE-2026-4636
Published: Apr 2, 2026
Modified: Apr 2, 2026
CVSS v3.1
8.1
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2.15-1 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-18 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-18 - < * |
Red Hat | Red Hat build of Keycloak 26.2.15 | All versions |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4.11-1 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-14 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-14 - < * |
Red Hat | Red Hat build of Keycloak 26.4.11 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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