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CVE-2024-36858

42
FAUCET Score

CVE-2024-36858 is a critical arbitrary file upload vulnerability in Jan v0.4.12, specifically within the /v1/app/writeFileSync interface, allowing attackers to execute arbitrary code. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not yet in CISA's KEV catalog, public Nuclei templates exist for exploitation, and it has garnered significant community discussion, indicating potential for future active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
0.4.12CPE matchmatch criteria
cpe:2.3:a:homebrew:jan:0.4.12:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.06%
Probability of exploitation in next 30 days
EPSS Percentile
86.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2024-36858 · May 22, 2025
This CVE's current EPSS score of 0.0306 is in the 78th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-qfjh-mvq6-c5p8critical

Jan path traversal vulnerability

Jun 4, 2024

References

github.com / HackAllSec/CVEs/tree/main/Jan%20Arbitrary%20File%20Upload%20vulnerability
ExploitThird Party Advisory