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CVE-2024-39943

49
FAUCET Score

CVE-2024-39943 is a critical OS command injection vulnerability affecting rejetto HFS (HTTP File Server) versions prior to 0.52.10 on Linux, UNIX, and macOS. It allows remote authenticated users with upload permissions to execute arbitrary OS commands due to improper use of execSync for the 'df' command. With a CVSS score of 8.8 (High) and an EPSS percentile of 0.78, this vulnerability poses a significant risk, enabling full compromise of confidentiality, integrity, and availability. While no active exploitation, public exploits, or community discussion have been observed, the high FAUCET Risk Score of 98/100 indicates its severe potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.52.10CPE matchmatch criteria
cpe:2.3:a:rejetto:http_file_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
39.01%
Probability of exploitation in next 30 days
EPSS Percentile
98.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.3901 is in the 98th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: hfsFixed in: 0.52.10

Vendor Advisories (1)

npmGHSA-5f4x-hwv2-w9w2high

rejetto HFS vulnerable to OS Command Execution by remote authenticated users

Jul 5, 2024

References

github.com / rejetto/hfs/commit/305381bd36eee074fb238b64302a252668daad1d
Patch
github.com / rejetto/hfs/compare/v0.52.9...v0.52.10
Patch
rejetto.com / wiki/index.php/HFS:_Working_with_uploads
Product