CVE-2026-97359
CVE-2026-97359
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/wgetnz/hfs2/blob/master/advisories/hfs2-upload-filename-template-inj… (technical-description, exploit)
- www.vulncheck.com/advisories/hfs2-rce-via-multipart-upload-filename-template-in… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-97359?
- CVE-2026-97359 is a critical-severity vulnerability, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 10.0/10. Published 2026-09-24.
- How severe is CVE-2026-97359?
- Critical severity. CVSS v3 base score is 10.0 out of 10.