CVE-2024-39943

rejetto HFS vulnerable to OS Command Execution by remote authenticated users

9.9 CriticalPublic exploitFix available

rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by remote authenticated users (if they have Upload permissions). This occurs because a shell is used to execute df (i.e., with execSync instead of spawnSync in child_process in Node.js).

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

39.5%Up 39.4 points since Jul 5, 2024

What each source reports

CVE List Score used 9.9

Record: CVE-2024-39943
CVSS 3.1: 9.9 CriticalCVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:C/UI:N
Weakness: CWE-284
Updated: 2026-11-02

EUVDEUVD-2024-2262 9.9

Record: EUVD-2024-2262
CVSS 3.1: 9.9 CriticalCVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:C/UI:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5f4x-hwv2-w9w2 8.7

rejetto HFS vulnerable to OS Command Execution by remote authenticated users

Record: GHSA-5f4x-hwv2-w9w2
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-78, CWE-284
Updated: 2026-11-02

NVD 9.9

Record: CVE-2024-39943
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78, CWE-284
Updated: 2026-11-02

OSV 9.9

Record: CVE-2024-39943
CVSS 3.1: 9.9 CriticalCVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:C/UI:N
Updated: 2026-11-02

OSVGHSA-5f4x-hwv2-w9w2 8.7

rejetto HFS vulnerable to OS Command Execution by remote authenticated users

Record: GHSA-5f4x-hwv2-w9w2
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-284, CWE-78
Updated: 2026-11-02

Affected products

rejetto http file server

Affected packages

Affected packages
Package	Affected	Fixed
`hfs` npm	before 0.52.10	0.52.10

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	Heyholiday067/CVE-2024-39943-Poc	2024-07-05
PoC in GitHub	JenmrR/Node.js-CVE-2024-39943	2025-04-19

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-39943 is a critical vulnerability (CVSS 9.9) in Rejetto Http File Server, published July 4, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 39.5%, the 98th percentile. Fixed in hfs 0.52.10.