Critical Malicious Code Vulnerability in transform-async-generator-functions Package

Summary

03/02/2026
CRITICAL
No i
Critical
Not published

MAL-2026-663: Malicious code in transform-async-generator-functions (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The transform-async-generator-functions package is an npm library designed to facilitate the transformation of asynchronous generator functions in JavaScript. It is commonly used in modern web applications to enhance asynchronous programming capabilities. However, this package has been identified to contain malicious code, posing significant security risks to systems that utilize it.

Vulnerability Detail

The vulnerability originates from the presence of embedded malicious code within the transform-async-generator-functions package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of this code has been confirmed by multiple sources, including Amazon Inspector and GHSA malware reports, indicating that systems using this package should be considered fully compromised.

How To Fix

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

npm uninstall transform-async-generator-functions

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 workaround, you can temporarily avoid using the transform-async-generator-functions package by refactoring your code to eliminate its dependency. This may involve using alternative libraries or implementing your own asynchronous generator function transformations.

Conclusion

The transform-async-generator-functions package has been identified as containing malicious code that poses serious security risks. It is essential for developers to remove this package, rotate any sensitive information, and consider alternative solutions to ensure the security of their applications.

See every vulnerability recorded for transform-async-generator-functions →

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FAQ

It is an npm library used for transforming asynchronous generator functions in JavaScript applications.

The malicious code can compromise your system, allowing unauthorized access to sensitive information and potentially leading to further security breaches.

You should immediately remove the package, rotate any secrets or keys stored on the affected system, and consider using alternative libraries.

Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software by analyzing your package-lock.json file.

You can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without needing to sign up.

How To Fix

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

npm uninstall transform-async-generator-functions

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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