Malicious Code Vulnerability in single_bison_z3n Package
Summary
MAL-2025-90506: Malicious code in single_bison_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The single_bison_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to inflate developer reputation scores through the creation of numerous derivative packages. The package's functionality is compromised due to the presence of autopublish scripts that manipulate its metadata and behavior.
Vulnerability Detail
The vulnerability originates from the malicious code embedded within the single_bison_z3n package. This code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of these variants. This not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages, potentially leading to security breaches and loss of trust in the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall single_bison_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 single_bison_z3n package from your project until a secure version is available. You can do this by executing: npm uninstall single_bison_z3n.
Conclusion
The single_bison_z3n package has been identified as containing malicious code that compromises its integrity and poses risks to developers. It is crucial to take immediate action by updating or removing the package and utilizing tools like Vulert to monitor for vulnerabilities in your software.
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FAQ
The single_bison_z3n package 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 file, removes private flags, and generates random package names, which can lead to security vulnerabilities and pollution of the npm registry.
If you have installed the single_bison_z3n package, you should uninstall it immediately and monitor for any updates or patches.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup.
To prevent similar vulnerabilities, regularly audit your dependencies, use tools like Vulert for real-time monitoring, and stay updated on security advisories related to the packages you use.
