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CVE-2026-18967

Estado: AnalizadaAlta (8.1)—

A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.

CVSS

Probabilidad de explotación (EPSS)

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.

AV:A (red adyacente) + fallo en validación SAML permite replay de aserciones → T1210. Hijacking de sesión y acceso no autorizado como usuario → T1078.002 (válidas cuentas de cuenta de usuario comprometida); manipulación de autenticación SAML → T1556.

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 ManagementUser Account ManagementPassword PoliciesMulti-factor AuthenticationVulnerability ScanningUser Training

Tecnologías afectadas (2)

Redhat — Build OF KeycloakRedhat — Jboss Enterprise Application Platform Expansion Pack

CWE

Referencias

JSON original (NVD)

Mostrar
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