Malicious Code Injection in lexical_python_z3n Package - npm Vulnerability
Summary
MAL-2025-98787: Malicious code in lexical_python_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The lexical_python_z3n package is part of the npm ecosystem, which is widely used for managing JavaScript packages. This package, like many others, is intended to facilitate the development of applications by providing reusable code components. However, it has been identified as part of a malicious campaign that aims to exploit the npm registry by generating and publishing numerous derivative packages with harmful scripts.
Vulnerability Detail
The vulnerability in the lexical_python_z3n package stems from its association with a malicious campaign that modifies package.json files to remove private flags and change version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This not only compromises the integrity of the npm ecosystem but also poses risks to developers who may unknowingly use these compromised packages, leading to potential security breaches in their applications.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall lexical_python_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 remove the lexical_python_z3n package from your project dependencies by running the following command: npm uninstall lexical_python_z3n. This will help mitigate the risk until a patched version is released.
Conclusion
The lexical_python_z3n package poses a significant security risk due to its malicious code injection. It is essential for developers to be vigilant and remove this package from their projects. Utilizing tools like Vulert can help in monitoring and identifying vulnerabilities in real-time, ensuring the security of your applications.
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FAQ
It is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.
Using this package can lead to security breaches, as it modifies package.json files and republishes malicious variants.
You should uninstall the lexical_python_z3n package immediately and monitor for any updates or patches.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using your package-lock.json file.
You can use the Vulert playground at Vulert Scanner to check for vulnerabilities without any signup.
