CVE-2026-9795

Estado: ModificadaAlta (7.3)—

A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Puntuación base: 7.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.49%
Percentil entre todas las CVEs puntuadas: 40
Fecha de la puntuación: 4/10/2026

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.

ExplotaciónT1203 Exploitation for Client Executionexecution75 %
Impacto principalT1098.003 Additional Cloud Rolespersistence · privilege escalation80 %
Impacto secundarioT1078.002 Domain Accountsstealth · persistence · privilege escalation · initial access75 %
Impacto secundarioT1556.001 Domain Controller Authenticationdefense impairment · persistence · credential access70 %

Requiere interacción del usuario (UI:R) para que acceda al cliente modificado y se proyecte el rol inyectado en su token. Permite escalar privilegios asignando roles no autorizados (T1098.003), obtener acceso elevado (T1078.002) y manipular políticas de autenticación (T1556.001).

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 Multi-factor Authentication User Training User Account Management Privileged Process Integrity Password Policies

Tecnologías afectadas (1)

Redhat — Build OF Keycloak

CWE

CWE-266
CWE-266

Referencias

JSON original (NVD)

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