Malicious Code Injection in parallel_hoverfly_z3n Package
Summary
MAL-2025-122441: Malicious code in parallel_hoverfly_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The parallel_hoverfly_z3n package is part of the npm ecosystem and is used for various functionalities related to hoverfly, a tool for API simulation and testing. However, this package has been identified as part of a malicious campaign that aims to inflate developer reputation scores through the automatic generation and publication of derivative packages. The malicious nature of this package compromises its integrity and poses significant risks to users.
Vulnerability Detail
The vulnerability stems from the package being involved in a token reward campaign that floods the npm registry with malicious packages. These packages contain scripts that modify the package.json file to remove private flags, alter version numbers, and generate random package names. This results in a pollution of the npm registry and can lead to unauthorized access or manipulation of projects that depend on this package. The malicious payload is designed to continuously republish variants, exacerbating the issue.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall parallel_hoverfly_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you can avoid using the parallel_hoverfly_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can monitor your dependencies using tools like Vulert, which alerts you in real-time for open-source vulnerabilities in your software.
Conclusion
The parallel_hoverfly_z3n package has been identified as containing malicious code that poses significant risks to users. It is essential to uninstall this package and monitor your dependencies for any vulnerabilities. Utilizing tools like Vulert can help maintain the security of your applications.
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FAQ
It is an npm package related to hoverfly, used for API simulation and testing.
The vulnerability can lead to unauthorized changes in your project's dependencies and potentially compromise your application's security.
You should uninstall the package immediately and check for any dependencies that may be affected.
Yes, you can use Vulert to monitor your project for open-source vulnerabilities in real-time without needing to access the code.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
