Malicious Code Injection in erwin-kue90-ruro Package

erwin-kue90-ruro Updated 24 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-102213: Malicious code in erwin-kue90-ruro (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The erwin-kue90-ruro 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 scripts that compromise its integrity and the integrity of the npm registry.

Vulnerability Detail

The vulnerability in the erwin-kue90-ruro package originates from malicious code that modifies the package.json file to remove private flags and alters version numbers. It generates random package names, primarily themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This behavior can lead to reputational damage for developers and potential security risks for applications relying on these packages.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall erwin-kue90-ruro

If 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 the erwin-kue90-ruro package by using the following command: npm uninstall erwin-kue90-ruro. Additionally, you can monitor your project for vulnerabilities using tools like Vulert, which analyzes your package-lock.json file to alert you of any open-source vulnerabilities.

Conclusion

The erwin-kue90-ruro package contains malicious code that poses significant risks to developers and their applications. It is crucial to take immediate action by updating or removing the package to safeguard your project. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in the future.

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FAQ

The erwin-kue90-ruro package is an npm package associated with the tea.xyz token reward campaign, designed to automate the generation and publication of derivative packages.

The malicious code modifies your package.json file, removes private flags, and generates random package names, which can lead to security risks and reputational damage.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

If a patched version is not available, it is advisable to uninstall the package from your project to mitigate risks.

Regularly monitor your dependencies using tools like Vulert, which can alert you to open-source vulnerabilities in real-time.

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How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall erwin-kue90-ruro

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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