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

CVE-2026-93567

Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-20 Validación incorrecta de entrada
Fecha de publicación:
18/09/2026
Última modificación:
10/10/2026

Descripción

*** Pendiente de traducción *** A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leading to a malformed HTTP/2 CONNECT request. This can bypass security controls such as tunnel allow-lists or egress policies, resulting in integrity loss.