Malicious Code Vulnerability in libxmljs2v2 Package

libxmljs2v2 Updated 19 Mar 2026

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1781: Malicious code in libxmljs2v2 (npm). Affects libxmljs2v2 versions 0.30.2. No fix is published. How to fix ↓

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Background

libxmljs2v2 is a JavaScript library for parsing and manipulating XML documents in Node.js applications. It provides a simple API for developers to work with XML data, enabling features such as XPath queries and DOM manipulation. However, the package has been identified to contain malicious code, posing a significant security risk to applications that utilize it.

Vulnerability Detail

The vulnerability in libxmljs2v2 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 even complete system takeover. The issue was reported by ReversingLabs, highlighting the need for immediate attention to prevent exploitation.

How To Fix

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

npm uninstall libxmljs2v2

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary workaround, you can remove the libxmljs2v2 package from your project until a secure version is available. You can do this by executing: npm uninstall libxmljs2v2. Consider using alternative libraries for XML parsing in the meantime.

Conclusion

The libxmljs2v2 package has been identified to contain malicious code, posing a serious threat to applications that utilize it. Immediate action is required to update or remove the package to mitigate potential risks. Utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.

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FAQ

libxmljs2v2 is a Node.js library for parsing and manipulating XML documents.

The malicious code can lead to unauthorized access and potential data breaches in applications.

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

Yes, updating to a version of libxmljs2v2 that is not 0.30.2 will resolve the vulnerability.

Consider removing the package temporarily and using alternative libraries for XML parsing until a secure version is available.

How To Fix

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

npm uninstall libxmljs2v2

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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