CVE-2026-3121

Estado: ModificadaAlta (7.2)—

A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration where this permission is equivalent to `manage-permissions`. This allows the administrator to escalate privileges and gain control over roles, users, or other administrative functions within the realm. This privilege escalation can occur when admin permissions are enabled at the realm level.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.2

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.53%
Percentil entre todas las CVEs puntuadas: 43
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement75 %
Impacto principalT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto secundarioT1098.003 Additional Cloud Rolespersistence · privilege escalation70 %
Impacto secundarioT1556.001 Domain Controller Authenticationdefense impairment · persistence · credential access65 %

Vector CVSS con PR:H y AV:N indica servicios remotos con privilegios administrativos. Misconfiguration de permisos permite escalada de privilegios (T1068) desde rol limitado a control total del realm, manipulación de cuentas y políticas de autenticación.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Threat Intelligence Program Multi-factor Authentication Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (4)

Redhat — Build OF Keycloak Redhat — Jboss Enterprise Application Platform Redhat — Jboss Enterprise Application Platform Expansion Pack Redhat — Single Sign-on

CWE

CWE-266

Referencias

JSON original (NVD)

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