CVE-2026-97359HFS2 2.4.0 RCE via Multipart Upload Filename Template Injection
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-1336
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rejetto hfs2 rejetto:hfs2 (from the name) | from 2.0.0 through 2.4.0 | CNA record |
References
- https://github.com/wgetnz/hfs2/blob/master/advisories/hfs2-upload-filename-template-injection/README.mdtechnical-description, exploit
- https://www.vulncheck.com/advisories/hfs2-rce-via-multipart-upload-filename-template-injectionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.