CVE-2026-9791

A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:25097
https://access.redhat.com/errata/RHSA-2026:25098
https://access.redhat.com/errata/RHSA-2026:30049
https://access.redhat.com/errata/RHSA-2026:30050
https://access.redhat.com/security/cve/CVE-2026-9791	Mitigation Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2482458	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*

History

26 Oct 2026, 12:10

Type	Values Removed	Values Added
Summary		(es) Se encontró una vulnerabilidad en Keycloak. Un usuario autenticado con una membresía de organización existente puede explotar esta vulnerabilidad al acceder a las API orientadas al usuario, como la API de cuenta, o al solicitar un token de OpenID Connect (OIDC) con el ámbito ’organization’. Esto permite que los metadatos de la organización se divulguen en los tokens, incluso después de que un administrador haya deshabilitado explícitamente la función de Organizaciones, lo que podría llevar a decisiones de autorización incorrectas por parte de los servidores de recursos.

Information

Published : 2026-05-28 05:16

Updated : 2026-10-26 12:10

NVD link : CVE-2026-9791

Mitre link : CVE-2026-9791

CVE.ORG link : CVE-2026-9791

JSON object : View

Products Affected

redhat

build_of_keycloak

CWE

CWE-863

Incorrect Authorization

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