Malicious Code Injection in sunderlan-uyilud-vanin Package

sunderlan-uyilud-vanin Updated 26 Nov 2025

Summary

12/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-166456: Malicious code in sunderlan-uyilud-vanin (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The sunderlan-uyilud-vanin 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 its integrity and the security of the npm registry.

Vulnerability Detail

The vulnerability in the sunderlan-uyilud-vanin package originates from its malicious payload, which modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior leads to the continuous republishing of variants that pollute the npm registry, potentially affecting other developers and users relying on the integrity of the npm ecosystem.

How To Fix

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

npm uninstall sunderlan-uyilud-vanin

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 sunderlan-uyilud-vanin package and look for alternative packages that provide similar functionality without the associated risks.

Conclusion

The sunderlan-uyilud-vanin package poses a significant security 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 to maintain the integrity of your software.

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FAQ

The sunderlan-uyilud-vanin package is an npm package linked to the tea.xyz token reward campaign, designed to automate the generation of derivative packages.

The vulnerability can lead to the pollution of the npm registry, affecting the integrity of your project's dependencies and potentially introducing security risks.

You should uninstall the sunderlan-uyilud-vanin package immediately using 'npm uninstall sunderlan-uyilud-vanin' and check for any alternative packages.

Yes, you can use Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities. You can check your application using the Vulert playground without any signup.

Regularly update your dependencies, monitor for vulnerabilities using tools like Vulert, and review your package.json and package-lock.json files for any suspicious packages.

How To Fix

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

npm uninstall sunderlan-uyilud-vanin

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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