Malicious Code Injection in yappy_rat_z3n Package
Summary
MAL-2025-111244: Malicious code in yappy_rat_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The yappy_rat_z3n package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability in the yappy_rat_z3n package originates from its inclusion in a campaign that floods the npm registry with malicious packages. The malicious payload modifies the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior leads to the continuous republishing of variants, which pollutes the npm registry and can potentially harm developers relying on legitimate packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall yappy_rat_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, you can avoid using the yappy_rat_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities in real-time.
Conclusion
The yappy_rat_z3n package poses a significant risk due to its malicious code that alters package metadata and floods the npm registry. It is crucial to remove this package from your projects and monitor for vulnerabilities using tools like Vulert to ensure the security of your applications.
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FAQ
The yappy_rat_z3n package is an npm package associated with the tea.xyz token reward campaign, designed to generate and publish derivative packages.
The malicious code modifies your package.json file, removes private flags, and generates random package names, which can lead to pollution of the npm registry and potential security risks.
No, there is currently no safe version or patch available for the yappy_rat_z3n package. It is recommended to uninstall the package entirely.
You can use Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities in your software.
If you have installed yappy_rat_z3n, you should uninstall it immediately using the command npm uninstall yappy_rat_z3n and look for alternative packages.
