Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-92855

Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-287 Autenticación incorrecta
Fecha de publicación:
05/11/2026
Última modificación:
06/11/2026

Descripción

*** Pendiente de traducción *** A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication to external identity providers. The issue occurs because the broker fails to verify that a user actually possesses the private key associated with a holder-of-key assertion. An attacker who intercepts a victim signed assertion can replay it to gain unauthorized access and impersonate the victim without needing their private key.