Markdownify subject to Remote Code Execution via malicious markdown file

published 2022-10-19 4 y ago modified 2026-06-17 4 mo ago also GHSA-c942-mfmp-p4fh , EUVD-2022-7076

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

Markdownify version 1.4.1 allows an external attacker to execute arbitrary code remotely on any client attempting to view a malicious markdown file through Markdownify. This is possible because the application has the "nodeIntegration" option enabled.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-05-08)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

fluidattacks.com https://fluidattacks.com/advisories/adams/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	electron-markdownify	<=1.4.1	no fix listed

Affected products

n/a Markdownify

Classification

Weakness

CWE-829 Inclusion of Functionality from Untrusted Control Sphere

References

fluidattacks.com /advisories/adams/
exploit, third-party-advisory
github.com /amitmerchant1990/electron-markdownify
package, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-41709
advisory
fluidattacks.com /advisories/adams
web

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