Malicious Code Injection in mammoth_bison_z3n: npm Package Vulnerability
Summary
MAL-2025-95369: Malicious code in mammoth_bison_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The mammoth_bison_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development of applications by providing reusable code. However, it has been identified as part of a malicious campaign that seeks to exploit the npm registry by flooding it with derivative packages that can inflate developer reputation scores for token rewards.
Vulnerability Detail
The vulnerability in the mammoth_bison_z3n package stems from its association with a malicious campaign that 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 a risk to developers who may unknowingly use these tainted packages, leading to potential security breaches and loss of trust in the ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall mammoth_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 avoid using the mammoth_bison_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can use tools like Vulert to monitor your project for vulnerabilities in real-time.
Conclusion
The mammoth_bison_z3n package poses a significant risk due to its malicious code that alters package metadata and floods the npm registry. It is crucial for developers to remove this package and monitor their projects for vulnerabilities to maintain the integrity and security of their applications.
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FAQ
The mammoth_bison_z3n package is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.
Using the mammoth_bison_z3n package can compromise your project's integrity, potentially leading to security breaches and loss of trust in your application.
You should uninstall the mammoth_bison_z3n package immediately and check for any dependencies that may rely on it.
Yes, you can use Vulert to monitor your project for open-source vulnerabilities in real-time without requiring access to the code or installation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
