HFS2 2.4.0 RCE via Multipart Upload Filename Template Injection (CVE-2026-97359) | HOL Guard CVE

Critical · CVSS 10.0CVE-2026-97359

HFS2 2.4.0 RCE via Multipart Upload Filename Template Injection

Answer in brief

CVE-2026-97359 records a Critical severity (CVSS 10.0) vulnerability in HFS2 2.4.0 RCE via Multipart Upload Filename Template Injection. The current sources do not mark it as known exploited. The current feed maps rejetto/hfs2 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 24, 2026First seen by HOL Sep 24, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 10.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rejetto/hfs2 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rejetto/hfs2generic	>=2.0.0 <=2.4.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for rejetto/hfs2.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 24, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.