Malicious Code Detected in duo-jsx Package - Security Alert
Summary
MAL-2025-18986: Malicious code in duo-jsx (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The duo-jsx package is a JavaScript library designed for JSX syntax transformation, commonly used in React applications. It allows developers to write HTML-like syntax in their JavaScript code, enhancing readability and maintainability. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that utilize it.
Vulnerability Detail
The vulnerability in the duo-jsx package stems from the inclusion of malicious code that can compromise the security of applications using this library. This code may lead to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for developers to take immediate action to mitigate potential risks.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall duo-jsxIf 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 avoid using the duo-jsx package altogether and consider using alternative libraries that provide similar functionality without the associated risks. Additionally, you can monitor your project for vulnerabilities using tools like Vulert, which analyzes your package-lock.json file to identify potential security issues.
Conclusion
The discovery of malicious code in the duo-jsx package highlights the importance of regularly monitoring and updating dependencies in software projects. Developers should take immediate action to remove this package and consider using secure alternatives to protect their applications from potential security threats.
See every vulnerability recorded for duo-jsx →
FAQ
duo-jsx is a JavaScript library that allows developers to use JSX syntax in their applications, primarily for React development.
The malicious code found in duo-jsx can lead to unauthorized access and potential data breaches, compromising the security of applications that use it.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If you are using duo-jsx, it is crucial to remove it from your project immediately and consider using a secure alternative.
Currently, there is no patched version available for duo-jsx. It is recommended to remove the package and look for alternatives.
