GHSA-mg69-6j3m-jvgw
HIGHGHSA-mg69-6j3m-jvgw is a high-severity (CVSS 7.3) vulnerability in marky-markdown. O3 Security confirms whether GHSA-mg69-6j3m-jvgw is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
HTML Injection in marky-markdown
Real-World Exposure
marky-markdownReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.
Description
All versions of marky-markdown are vulnerable to HTML Injection. The package fails to sanitize style attributes in img tags of the markdown input. This may allow attackers to affect the size of images in the rendered HTML.
Recommendation
This package is no longer maintained. Please upgrade to @npmcorp/marky-markdown
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | marky-markdown | ≥ 0.0.0 | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for marky-markdown. 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 marky-markdown has shipped for GHSA-mg69-6j3m-jvgw 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-mg69-6j3m-jvgw 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-mg69-6j3m-jvgw. 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-mg69-6j3m-jvgw in your dependencies?
O3 detects GHSA-mg69-6j3m-jvgw across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.