CVE-2026-97359

Critical

Description

HFS2 version 2.4.0 and earlier contains a template injection vulnerability in the multipart upload handler that allows unauthenticated attackers to achieve remote code execution by embedding malicious template syntax in a filename. Attackers can craft a filename containing a closing template quoting sequence followed by an exec macro, which bypasses the authorization check in the dispatcher to execute arbitrary commands on the underlying host system.

SeverityCritical
CVSS10.0
Exploit probability—
ProductRejetto Hfs2
PublishedSep 24, 2026
First seenSep 24, 2026
Weakness typeCWE-1336CWE-1336

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
rejetto hfs22.0.0 ≤ v ≤ 2.4.0—

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