tschaub gh-pages vulnerable to prototype pollutionGHSA-8mmm-9v2q-x3f9
CRITICALFix: tschaub/gh-pages#452GHSA-8mmm-9v2q-x3f9 is a critical-severity (CVSS 9.8) CWE-1321 vulnerability in gh-pages. A fix is available for gh-pages — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-8mmm-9v2q-x3f9.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
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.
gh-pagesnpmDescription
Prototype pollution vulnerability in tschaub gh-pages 3.1.0 via the partial variable in util.js.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | gh-pages | all versions | 5.0.0npm install gh-pages@5.0.0 |
Affected Products
gh-pagesgh-pages_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for gh-pages, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update gh-pages to 5.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8mmm-9v2q-x3f9 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.
Frequently Asked Questions
Is GHSA-8mmm-9v2q-x3f9 in your dependencies?
Find it across npm, including transitive dependencies.