What is CVE-2024-36858?

CVE-2024-36858 is a critical-severity vulnerability in Homebrew Jan, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2024-06-04.

How severe is CVE-2024-36858?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2024-36858 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Homebrew Jan

CVE-2024-36858

An arbitrary file upload vulnerability in the /v1/app/writeFileSync interface of Jan v0.4.12 allows attackers to execute arbitrary code via uploading a crafted file.

Vulnerability class: Unrestricted File Upload

Published 2024-06-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.030 (87.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

Homebrew Jan — versions 0.4.12

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

github.com/HackAllSec/CVEs/tree/main/Jan Arbitrary File Upload vulnerability (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-36858?: CVE-2024-36858 is a critical-severity vulnerability in Homebrew Jan, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2024-06-04.
How severe is CVE-2024-36858?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2024-36858 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.