CVE-2024-39943

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 48.5%, top 1% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 39%CVSS: 9.9Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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).

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
79(Attend)
EG Risk 79/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation48% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
39%
EPSS %ILE
98%
KEV
Not listed

Published

July 4, 2024

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jul 20, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Comparing v0.52.9...v0.52.10 · rejetto/hfs · GitHub

https://github.com/rejetto/hfs/compare/v0.52.9...v0.52.10
github_commit

commit 305381bd36ee (rejetto/hfs)

Fix landed in rejetto/hfs commit 305381bd36ee — awaiting tagged release

https://github.com/rejetto/hfs/commit/305381bd36eee074fb238b64302a252668daad1d

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
hfs—0.52.10—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-26 14:53 UTCEPSS rescore
  2. 2026-07-25 14:16 UTCEPSS rescore
  3. 2026-07-24 14:16 UTCEPSS rescore
  4. 2026-07-23 02:38 UTCEG score recompute
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-22 14:07 UTCEPSS rescore
  7. 2026-07-21 15:23 UTCEPSS rescore
  8. 2026-07-21 15:23 UTCEPSS rescore
  9. 2026-07-20 17:06 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-19 02:28 UTCEPSS rescore
  12. 2026-07-18 10:03 UTCEPSS rescore
  13. 2026-07-16 17:02 UTCEPSS rescore
  14. 2026-07-15 16:56 UTCEPSS rescore
  15. 2026-07-15 16:56 UTCEPSS rescore
  16. 2026-07-14 02:55 UTCOSV refresh
  17. 2026-07-13 22:29 UTCEPSS rescore
  18. 2026-07-13 06:11 UTCEPSS rescore
  19. 2026-07-12 05:45 UTCEPSS rescore
  20. 2026-07-11 08:26 UTCEPSS rescore
  21. 2026-07-11 08:26 UTCEPSS rescore
  22. 2026-07-09 19:09 UTCEPSS rescore
  23. 2026-07-08 15:14 UTCEPSS rescore
  24. 2026-07-08 15:13 UTCEPSS rescore
  25. 2026-07-07 13:45 UTCEPSS rescore
Show 51 more
  1. 2026-07-05 02:29 UTCEPSS rescore
  2. 2026-07-01 15:05 UTCEPSS rescore
  3. 2026-06-30 23:21 UTCEPSS rescore
  4. 2026-06-30 23:21 UTCEPSS rescore
  5. 2026-06-29 14:05 UTCEPSS rescore
  6. 2026-06-28 04:55 UTCEPSS rescore
  7. 2026-06-28 04:55 UTCEPSS rescore
  8. 2026-06-27 03:07 UTCEPSS rescore
  9. 2026-06-27 03:07 UTCEPSS rescore
  10. 2026-06-26 00:16 UTCOSV refresh
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-24 14:04 UTCEPSS rescore
  13. 2026-06-24 14:04 UTCEPSS rescore
  14. 2026-06-23 21:32 UTCEPSS rescore
  15. 2026-06-23 21:32 UTCEPSS rescore
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-21 01:58 UTCEPSS rescore
  19. 2026-06-21 01:58 UTCEPSS rescore
  20. 2026-06-19 19:25 UTCEPSS rescore
  21. 2026-06-19 19:25 UTCEPSS rescore
  22. 2026-06-18 17:52 UTCEPSS rescore
  23. 2026-06-18 17:51 UTCEPSS rescore
  24. 2026-06-17 17:52 UTCEPSS rescore
  25. 2026-06-16 17:52 UTCEPSS rescore
  26. 2026-06-16 17:52 UTCEPSS rescore
  27. 2026-06-15 17:47 UTCEPSS rescore
  28. 2026-06-13 22:59 UTCEPSS rescore
  29. 2026-06-13 22:59 UTCEPSS rescore
  30. 2026-06-12 23:11 UTCEPSS rescore
  31. 2026-06-10 22:17 UTCEPSS rescore
  32. 2026-06-08 13:42 UTCOSV refresh
  33. 2026-06-07 15:24 UTCEPSS rescore
  34. 2026-06-07 15:24 UTCEPSS rescore
  35. 2026-06-06 13:46 UTCEPSS rescore
  36. 2026-06-06 13:46 UTCEPSS rescore
  37. 2026-06-05 22:46 UTCEPSS rescore
  38. 2026-06-05 22:46 UTCEPSS rescore
  39. 2026-06-05 06:09 UTCEPSS rescore
  40. 2026-06-05 06:09 UTCEPSS rescore
  41. 2026-06-04 13:11 UTCEPSS rescore
  42. 2026-06-04 13:11 UTCEPSS rescore
  43. 2026-06-01 13:51 UTCEPSS rescore
  44. 2026-06-01 13:51 UTCEPSS rescore
  45. 2026-05-31 22:30 UTCEPSS rescore
  46. 2026-05-31 22:30 UTCEPSS rescore
  47. 2026-05-31 00:15 UTCEPSS rescore
  48. 2026-05-31 00:15 UTCEPSS rescore
  49. 2026-05-26 13:43 UTCEPSS rescore
  50. 2026-05-26 13:43 UTCEPSS rescore
  51. 2026-05-23 22:57 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-39943?
CVE-2024-39943 is a critical vulnerability published on July 4, 2024. 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).
When was CVE-2024-39943 disclosed?
CVE-2024-39943 was first published in the National Vulnerability Database on July 4, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-39943 actively exploited?
CVE-2024-39943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39% probability of exploitation in the next 30 days, which ranks it in the top 1.6% of all scored CVEs.
What is the CVSS score of CVE-2024-39943?
CVE-2024-39943 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2024-39943?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-39943, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-39943

Explore →

Is Your Infrastructure Affected by CVE-2024-39943?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs