flatnest Prototype Pollution vulnerabilityGHSA-7px2-3c2p-q4v4
HIGHFix: brycebaril/node-flatnest@27d569bGHSA-7px2-3c2p-q4v4 is a high-severity (CVSS 7.3) CWE-1321 vulnerability in flatnest. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
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.
flatnestnpmDescription
All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in flatnest/nest.js file.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | flatnest | all versions | No fix |
Affected Products
flatnestflatnest_projectResearch 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 flatnest, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of flatnest for GHSA-7px2-3c2p-q4v4. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
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.
Frequently Asked Questions
Is GHSA-7px2-3c2p-q4v4 in your dependencies?
Find it across npm, including transitive dependencies.