GHSA-7vh7-fw88-wj87 — commonmarker
Fix: gjtorikian/commonmarker@db8cd37GHSA-7vh7-fw88-wj87 is a security vulnerability in commonmarker. A fix is available for commonmarker — see the affected versions and patch details below.
Several quadratic complexity bugs may lead to denial of service in Commonmarker
Real-World Exposure
commonmarkerReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Several quadratic complexity bugs in commonmarker's underlying cmark-gfm library may lead to unbounded resource exhaustion and subsequent denial of service.
The following vulnerabilities were addressed:
For more information, consult the release notes for version 0.29.0.gfm.12.
Mitigation
Users are advised to upgrade to commonmarker version 0.23.10.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | commonmarker | all versions | 0.23.10bundle update commonmarker --conservative |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commonmarker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update commonmarker to 0.23.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7vh7-fw88-wj87 is resolved across your whole dependency graph.
Workarounds
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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-7vh7-fw88-wj87 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-7vh7-fw88-wj87. 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-7vh7-fw88-wj87 in your dependencies?
O3 Security finds GHSA-7vh7-fw88-wj87 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.