CVE-2024-36858

Jan vulnerability

CVSS

9.8

EPSS

3.1%

EPSS pct

86th

Exploited

No known

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.

Affected vendor

Homebrew

Affected product

Jan

CVSS vector

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

Weakness type (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Published

2024-06-04

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2024-36858

Confirm whether Homebrew Jan is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2024-36858.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2024-36858

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2024-36858 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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