GHSA-c942-mfmp-p4fh
HIGHGHSA-c942-mfmp-p4fh is a high-severity (CVSS 7.8) CWE-829 vulnerability in electron-markdownify. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-c942-mfmp-p4fh is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Markdownify subject to Remote Code Execution via malicious markdown file
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
electron-markdownifynpmDescription
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. There are currently no patched versions and no known workarounds.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | electron-markdownify | all versions | No fix |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for electron-markdownify. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of electron-markdownify has shipped for GHSA-c942-mfmp-p4fh yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-c942-mfmp-p4fh is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-c942-mfmp-p4fh. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-c942-mfmp-p4fh in your dependencies?
O3 detects GHSA-c942-mfmp-p4fh across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.