CVE-2026-37981

A flaw was found in Keycloak. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. By sending crafted requests with arbitrary usernames or email values, the endpoint returns full profile objects for unrelated users. This leads to broad profile-level information disclosure.

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-2026:19596	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:19597	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-37981	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2455326	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

26 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Se encontró una falla en Keycloak. Una vulnerabilidad de control de acceso roto en el endpoint de búsqueda de usuarios de Account Resources permite a un usuario remoto autenticado, que posee al menos un recurso de Acceso Gestionado por el Usuario (UMA), enumerar y recopilar información de identificación personal (PII) para todos los usuarios del reino. Al enviar solicitudes manipuladas con nombres de usuario o valores de correo electrónico arbitrarios, el endpoint devuelve objetos de perfil completos para usuarios no relacionados. Esto conduce a una amplia revelación de información a nivel de perfil.

Information

Published : 2026-05-19 12:16

Updated : 2026-10-26 13:10

NVD link : CVE-2026-37981

Mitre link : CVE-2026-37981

CVE.ORG link : CVE-2026-37981

JSON object : View

Products Affected

redhat

build_of_keycloak

CWE

CWE-1220

Insufficient Granularity of Access Control

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