CVE-2026-33805

Gravedad CVSS v4.0:

CRÍTICA

Tipo:

No Disponible / Otro tipo

Fecha de publicación:

15/04/2026

Última modificación:

15/04/2026

Descripción

*** Pendiente de traducción *** @fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client&#39;s Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from. <br /> <br /> Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N CVSS v4.0 Severidad y Métricas:

Puntuación base: 9.00 CRÍTICA
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Present
Privilegios Requeridos (PR): Ninguno
Interacción del usuario (UI): Ninguno
Confidentiality (VC): Ninguno
Integrity (VI): Alto
Availability (VA): Ninguno
Confidentiality (SC): Bajo
Integrity (SI): Alto
Availability (SA): Ninguno

Puntuación base 4.0

9.00

Gravedad 4.0

CRÍTICA

CVE-2026-33805

Descripción

Impacto

Referencias a soluciones, herramientas e información