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

CVE-2026-40496

Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-330 Uso de valores insuficientemente aleatorios
Fecha de publicación:
21/04/2026
Última modificación:
21/04/2026

Descripción

*** Pendiente de traducción *** FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are generated using a weak and predictable formula: `md5(APP_KEY + attachment_id + size)`. Since attachment_id is sequential and size can be brute-forced in a small range, an unauthenticated attacker can forge valid tokens and download any private attachment without credentials. Version 1.8.213 fixes the issue.