Malicious Code Vulnerability in aligntypeer Package

aligntypeer Updated 19 Mar 2026

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1654: Malicious code in aligntypeer (npm). Affects aligntypeer versions 3.3.9. No fix is published. How to fix ↓

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Background

The aligntypeer package is a Node.js library designed for aligning peer dependencies in JavaScript projects. It simplifies the management of package dependencies, ensuring that the correct versions are used across different modules. However, this package has been identified as containing malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the aligntypeer package arises from the inclusion of malicious code that can compromise the integrity of applications using it. This code can lead to unauthorized access, data breaches, or even complete system takeover. The malicious code was discovered in version 3.3.9 of the package, and it is crucial for developers to be aware of its potential ramifications, including loss of sensitive data and disruption of services.

How To Fix

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

npm uninstall aligntypeer

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 remove the aligntypeer package from your project until a secure version is released. You can do this by executing the following command: npm uninstall aligntypeer. This will help mitigate the risk while you await a fix.

Conclusion

The aligntypeer package has been identified as containing malicious code that poses serious security risks. It is essential for developers to take immediate action by updating or removing the package to protect their applications. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.

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FAQ

The aligntypeer package is a Node.js library that helps manage peer dependencies in JavaScript projects.

The vulnerability involves malicious code that can compromise application security, leading to unauthorized access or data breaches.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.

If you are using version 3.3.9 of aligntypeer, it is advised to uninstall the package or update it to a secure version as soon as it is available.

The vulnerability was reported by ReversingLabs, a security research firm specializing in malware analysis.

How To Fix

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

npm uninstall aligntypeer

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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