Malicious Code Vulnerability in nosy_jay_z3n Package
Summary
MAL-2025-106385: Malicious code in nosy_jay_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The nosy_jay_z3n package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability in the nosy_jay_z3n package originates from its association with a malicious campaign that floods the npm registry with derivative packages. The malicious payload modifies the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior leads to the pollution of the npm registry and can potentially harm developers by affecting their reputation and the reliability of the packages they use.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall nosy_jay_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a workaround, you can temporarily avoid using the nosy_jay_z3n package and replace it with a trusted alternative. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.
Conclusion
The nosy_jay_z3n package contains malicious code that compromises the integrity of the npm registry. It is crucial to uninstall this package and monitor your project for vulnerabilities to maintain a secure development environment.
See every vulnerability recorded for nosy_jay_z3n →
FAQ
The nosy_jay_z3n package is an npm package associated with a token reward campaign that generates and publishes derivative packages.
The malicious code modifies your package.json file, potentially leading to the pollution of the npm registry and affecting your project's integrity.
You should uninstall the nosy_jay_z3n package immediately and check for any dependencies that may rely on it.
Yes, you can use Vulert to monitor your project for open-source vulnerabilities in real-time by analyzing your package-lock.json.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
