Critical Malicious Code Vulnerability in syntax-async-functions Package
Summary
MAL-2026-559: Malicious code in syntax-async-functions (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The syntax-async-functions package is an npm library designed to facilitate the use of asynchronous functions in JavaScript. It allows developers to write cleaner and more manageable asynchronous code. However, this package has been found to contain malicious code, posing a significant security risk to any system utilizing it.
Vulnerability Detail
The vulnerability originates from the inclusion of malicious code within the syntax-async-functions package. This code can compromise any computer that has the package installed, potentially leading to unauthorized access to sensitive information, including secrets and keys. The malicious nature of the code means that simply removing the package may not eliminate all traces of the compromise, as full control of the affected system may have been granted to an external entity.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall syntax-async-functionsIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, it is recommended to avoid using the syntax-async-functions package altogether until a secure version is released. If you need similar functionality, consider using alternative libraries that do not have known vulnerabilities.
Conclusion
The syntax-async-functions package has been identified as containing malicious code, posing a significant risk to systems that utilize it. Immediate action is required to remove the package and secure any exposed information. Regular monitoring of dependencies is essential to mitigate future vulnerabilities.
See every vulnerability recorded for syntax-async-functions →
FAQ
It is an npm library that helps developers write asynchronous JavaScript code more effectively.
You can check your application for vulnerabilities using Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to use the Vulert playground without any signup.
You should immediately uninstall the package and rotate any sensitive information that may have been compromised.
Regularly monitor your dependencies using tools like Vulert and keep your packages updated to their latest secure versions.
Using compromised packages can lead to unauthorized access, data breaches, and potential control over your system by malicious actors.
