Malicious Code Injection in necessary_antlion_z3n Package
Summary
MAL-2025-95617: Malicious code in necessary_antlion_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The necessary_antlion_z3n package is part of the npm ecosystem, typically used for various JavaScript functionalities. However, it has been identified as part of a malicious campaign aimed at inflating developer reputation scores through the tea.xyz token reward system. This package is designed to automatically generate and publish derivative packages with randomized names, which can lead to significant pollution of the npm registry.
Vulnerability Detail
The vulnerability originates from the package's malicious code, which modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior not only compromises the integrity of the npm registry but also poses risks to developers who may unknowingly use these tainted packages. 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 necessary_antlion_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 necessary_antlion_z3n package altogether and look for alternative packages that provide similar functionality without the associated risks.
Conclusion
The necessary_antlion_z3n package poses a significant risk due to its malicious code designed to manipulate package metadata and pollute the npm registry. It is crucial for developers to remove this package and monitor their projects for similar vulnerabilities.
See every vulnerability recorded for necessary_antlion_z3n →
FAQ
It is an npm package that has been identified as part of a malicious campaign to inflate developer reputation scores.
The malicious code modifies your package.json, potentially exposing your project to further vulnerabilities and polluting the npm registry.
You should uninstall the package immediately and check your package-lock.json for any references to it.
Yes, tools like Vulert can monitor your package-lock.json for open-source vulnerabilities in real-time without requiring code access.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
