Malicious Code Injection in encouraging_basilisk_z3n Package
Summary
MAL-2025-98699: Malicious code in encouraging_basilisk_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The encouraging_basilisk_z3n package is part of the npm ecosystem, often associated with token reward campaigns. It is designed to facilitate the distribution of software packages, but it has been compromised to include malicious scripts that manipulate package metadata. This vulnerability poses a significant risk to developers and users by potentially flooding the npm registry with harmful packages.
Vulnerability Detail
The vulnerability originates from the encouraging_basilisk_z3n package, which is linked to a broader malicious campaign targeting npm. The package contains scripts that automatically modify the package.json file, removing private flags and altering version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to inflate developer reputation scores. This behavior can lead to a polluted npm registry, making it difficult for developers to find legitimate packages and increasing the risk of unintentional installation of malicious software.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall encouraging_basilisk_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 prevent the installation of this package by using npm's package-lock.json to monitor dependencies. Additionally, consider using tools like Vulert to check for vulnerabilities in your project without requiring code access. You can use the Vulert playground at https://vulert.com/scanner to assess if your application is affected by this vulnerability.
Conclusion
The encouraging_basilisk_z3n package poses a significant security risk due to its malicious code that alters package metadata and floods the npm registry. It is essential for developers to remove this package and monitor their projects for vulnerabilities using tools like Vulert to ensure ongoing security.
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FAQ
It is an npm package that has been compromised to include malicious code aimed at manipulating package metadata and flooding the npm registry.
The vulnerability can lead to the installation of malicious packages, potentially compromising your project's security and integrity.
You should immediately remove the encouraging_basilisk_z3n package from your project and check for any other affected packages.
Yes, you can use Vulert to monitor your project for open-source vulnerabilities in real-time using just your package-lock.json.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by vulnerabilities without requiring any signup.
