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

CVE-2026-42091

Gravedad CVSS v3.1:
MEDIA
Tipo:
CWE-352 Falsificación de petición en sitios cruzados (Cross-Site Request Forgery)
Fecha de publicación:
04/05/2026
Última modificación:
05/05/2026

Descripción

*** Pendiente de traducción *** goshs is a SimpleHTTPServer written in Go. Prior to version 2.0.2, the PUT upload handler (httpserver/updown.go) lacks the CSRF token validation that was added to the POST upload handler during the CVE-2026-40883 fix. Combined with the unconditional Access-Control-Allow-Origin: * on the OPTIONS preflight handler (httpserver/server.go), any website can write arbitrary files to a goshs instance through the victim's browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2.