Malicious Code Vulnerability in libxmljs2as Package

libxmljs2as Updated 19 Mar 2026

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1779: Malicious code in libxmljs2as (npm). Affects libxmljs2as versions 1.0.0. No fix is published. How to fix ↓

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Background

libxmljs2as is an npm package designed for XML parsing and manipulation in JavaScript applications. It provides a simple interface for developers to work with XML data structures. However, this package has been identified as containing malicious code, which poses significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability in libxmljs2as stems from the inclusion of malicious code that can compromise the integrity of applications using this package. This malicious code can lead to unauthorized access, data breaches, or other harmful actions within the application environment. The issue was reported by ReversingLabs and affects version 1.0.0 of the package.

How To Fix

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

npm uninstall libxmljs2as

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 libxmljs2as package from your project until a secure version is released. You can do this by running the following command: npm uninstall libxmljs2as.

Conclusion

The libxmljs2as package has been identified as containing malicious code that poses significant security risks. It is crucial for developers using this package to take immediate action by updating to a secure version or removing the package until a fix is available. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

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FAQ

libxmljs2as is an npm package used for parsing and manipulating XML data in JavaScript applications.

The malicious code can compromise application security, leading to unauthorized access and potential data breaches.

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

If an immediate update is not possible, consider removing the package as a temporary measure until a secure version is available.

The vulnerability was reported by ReversingLabs, a cybersecurity firm specializing in threat intelligence.

How To Fix

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

npm uninstall libxmljs2as

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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