Malicious Code Injection in udin-mangut69-kyuki Package

udin-mangut69-kyuki Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-91382: Malicious code in udin-mangut69-kyuki (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The udin-mangut69-kyuki package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to manipulate npm's package registry by automatically generating and publishing derivative packages with randomized names. Its primary function is to inflate developer reputation scores for token rewards, making it a target for malicious activities.

Vulnerability Detail

The vulnerability in the udin-mangut69-kyuki package stems from its malicious code that modifies the package.json file. It removes private flags, alters version numbers, and generates random package names, which leads to the continuous republishing of these variants. This behavior 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 in their applications.

How To Fix

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

npm uninstall udin-mangut69-kyuki

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 →

Workaround

As a temporary workaround, you can avoid using the udin-mangut69-kyuki package and any other packages that may have been published as derivatives. Regularly audit your dependencies using tools like npm audit to identify and mitigate risks.

Conclusion

The udin-mangut69-kyuki package poses a significant risk due to its malicious code that alters package metadata and floods the npm registry with compromised packages. It is crucial for developers to remove this package and regularly audit their dependencies to maintain the security of their applications.

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FAQ

The udin-mangut69-kyuki package is an npm package involved in a token reward campaign that generates and publishes malicious derivatives to inflate developer reputation scores.

You can use the Vulert platform to monitor your package-lock.json file for vulnerabilities. Visit Vulert Scanner to check if your application is affected without needing to sign up.

Using compromised packages can lead to security vulnerabilities in your application, including unauthorized access, data breaches, and potential damage to your reputation as a developer.

There is no patch for the udin-mangut69-kyuki package due to its malicious nature. The best course of action is to remove it from your project.

Regularly audit your dependencies, use trusted sources for packages, and monitor your projects with tools like Vulert to stay informed about potential vulnerabilities.

How To Fix

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

npm uninstall udin-mangut69-kyuki

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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