Malicious Code Vulnerability in nintendo-test Package

nintendo-test Updated 24 Dec 2025

Summary

23/12/2025
CRITICAL
No i
Critical
Not published

MAL-2025-192823: Malicious code in nintendo-test (npm). Affects nintendo-test versions 1.0.0. No fix is published. How to fix ↓

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Background

The nintendo-test package is an npm library designed for testing purposes related to Nintendo applications. It provides developers with tools to simulate and validate various functionalities. However, this package has been identified as containing malicious code, which poses significant risks to users and their applications.

Vulnerability Detail

The vulnerability in the nintendo-test package stems from the inclusion of malicious code that can compromise the security of applications utilizing this library. This code can lead to unauthorized access, data breaches, or even complete system takeover. The malicious nature of this code was identified by ReversingLabs, highlighting the importance of scrutinizing third-party packages before integration.

How To Fix

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

npm uninstall nintendo-test

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 nintendo-test package altogether and look for alternative libraries that provide similar functionalities without the associated risks. Additionally, you can monitor your package dependencies using tools like Vulert, which can alert you to vulnerabilities in real-time.

Conclusion

The nintendo-test package has been identified as containing malicious code that poses significant security risks. It is essential for developers to remove this package and seek alternatives or patched versions to ensure the safety of their applications. Utilizing tools like Vulert can further enhance security by providing real-time vulnerability alerts.

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FAQ

The nintendo-test package is an npm library used for testing Nintendo-related applications, providing developers with necessary tools for simulation and validation.

The malicious code in nintendo-test can lead to unauthorized access and potential data breaches, posing serious security risks to applications that utilize this package.

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 you are using the nintendo-test package, you should uninstall it immediately and look for alternative packages or a patched version if available.

Vulert monitors and alerts for open-source vulnerabilities in your software by analyzing the package-lock.json file, allowing for real-time updates on potential risks.

How To Fix

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

npm uninstall nintendo-test

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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