Jan path traversal vulnerability

published 2024-06-04 2 y ago modified 2026-06-17 4 mo ago also GHSA-878h-rqcq-mv3x , EUVD-2024-1976

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits: 0; none known

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

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 2 y ago (2024-08-15)

Exploit prediction

0.99% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/HackAllSec/CVEs/tree/main/Jan%20Arbitrary%20File%20Upload%20vulnerability referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	@janhq/core	<=0.1.11	no fix listed

Affected products

jan jan

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

github.com /HackAllSec/CVEs/tree/main/Jan%20Arbitrary%20File%20Upload%20vulnerability
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2024-37273
advisory
github.com /janhq/jan
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary