Malicious Code Detected in babel-preset-webpack-es2015: A Critical Security Alert

babel-preset-webpack-es2015 Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-15308: Malicious code in babel-preset-webpack-es2015 (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package babel-preset-webpack-es2015 is a preset for Babel that allows developers to use ES2015 features in their Webpack projects. It is widely used in JavaScript applications to ensure compatibility with various environments. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users who integrate it into their projects.

Vulnerability Detail

The vulnerability in babel-preset-webpack-es2015 stems from the inclusion of malicious code that can compromise the security of applications using this package. 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 imperative for users 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 babel-preset-webpack-es2015

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 babel-preset-webpack-es2015 package from your project until a secure version is released. Use the following command to uninstall it: npm uninstall babel-preset-webpack-es2015.

Conclusion

The discovery of malicious code in babel-preset-webpack-es2015 highlights the importance of vigilance when using open-source packages. Users must take immediate action to update or remove the affected package to safeguard their applications from potential threats.

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FAQ

babel-preset-webpack-es2015 is a Babel preset that allows developers to use ES2015 features in their Webpack projects.

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

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without requiring any signup.

Users are advised to check the official repository for any patched versions of babel-preset-webpack-es2015 and update accordingly.

If an immediate update is not possible, consider removing the package from your project as a temporary measure 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 babel-preset-webpack-es2015

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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