CVE-2024-39943: rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by r

Q: How do I fix CVE-2024-39943?

http file server: upgrade to 0.52.10. Exact commands for each OS are on this page.

Q: Is CVE-2024-39943 being exploited?

CVE-2024-39943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-39943 affect?

CVE-2024-39943 affects http file server. Severity is critical (CVSS 9.9). 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 execSyn

Q: How urgent is CVE-2024-39943?

Priority 64/100. Critical severity; EPSS top 1%: very likely to be exploited; On your watchlist

This week

CRITICAL 9.9WATCHLISTUPGRADE

CVE-2024-39943 is a critical-severity flaw (CVSS 9.9) affecting http file server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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).

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	39.5% (top 1%)
CISA exploited list	No
Weakness	CWE-78, CWE-284
Published	2024-07-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: rejetto

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-04 23:15 UTCPublished CVE record published
2026-06-17 07:43 UTCUpdated Record last modified

rejetto http file server UPGRADE

Affected: < 0.52.10

Fixed in: 0.52.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy http-file-server || rpm -q http-file-server || http-file-server --version

2. UPGRADE to 0.52.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade http-file-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade http-file-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-39943?

http file server: upgrade to 0.52.10. Exact commands for each OS are on this page.

Is CVE-2024-39943 being exploited?

CVE-2024-39943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-39943 affect?

CVE-2024-39943 affects http file server. Severity is critical (CVSS 9.9). 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 execSyn

How urgent is CVE-2024-39943?

Priority 64/100. Critical severity; EPSS top 1%: very likely to be exploited; On your watchlist

Software pages

Node.js vulnerabilities · macOS vulnerabilities

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References

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