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

CVE-2026-44088

Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-434 Subida sin restricciones de ficheros de tipos peligrosos
Fecha de publicación:
15/05/2026
Última modificación:
15/05/2026

Descripción

*** Pendiente de traducción *** SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded.<br /> <br /> <br /> This issue was fixed in version 1.2.1.