CVE-2026-82450
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-434
Subida sin restricciones de ficheros de tipos peligrosos
Fecha de publicación:
29/08/2026
Última modificación:
29/08/2026
Descripción
*** Pendiente de traducción *** BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP import functionality that allows users with Import Content and Create Books permissions to upload a PHP polyglot file as a book cover. Attackers can bypass image extension validation by embedding a PHP file with a .php filename in the ZIP archive, which is stored in the public web root and executed by unauthenticated requests.
Impacto
Puntuación base 4.0
8.70
Gravedad 4.0
ALTA
Puntuación base 3.x
8.80
Gravedad 3.x
ALTA



