GHSA-2pr6-76vf-7546 is a medium-severity (CVSS 5.9) vulnerability in js-yaml. A fix is available for js-yaml — see the affected versions and patch details below.
Denial of Service in js-yaml
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
js-yamlnpmDescription
Versions of js-yaml prior to 3.13.0 are vulnerable to Denial of Service. By parsing a carefully-crafted YAML file, the node process stalls and may exhaust system resources leading to a Denial of Service.
Recommendation
Upgrade to version 3.13.0.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | js-yaml | all versions | 3.13.0npm install js-yaml@3.13.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for js-yaml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update js-yaml to 3.13.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2pr6-76vf-7546 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-2pr6-76vf-7546 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-2pr6-76vf-7546. 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-2pr6-76vf-7546 in your dependencies?
O3 Security finds GHSA-2pr6-76vf-7546 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.