Critical Malicious Code Vulnerability in egg-arbitrary Package

egg-arbitrary Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-19245: Malicious code in egg-arbitrary (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The egg-arbitrary package is an npm module designed for arbitrary code execution within Node.js applications. It is commonly used for various functionalities that require dynamic code evaluation. However, due to its nature, it can be susceptible to security flaws, particularly if not properly managed. This vulnerability exposes users to potential malicious code execution, which can compromise application integrity and user data.

Vulnerability Detail

The vulnerability in the egg-arbitrary package stems from the presence of malicious code that was intentionally introduced. This code can execute arbitrary commands on the host system, leading to severe security risks such as data theft, unauthorized access, and system compromise. The vulnerability affects all versions starting from 0, making it critical for users to take immediate action to mitigate risks.

How To Fix

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

npm uninstall egg-arbitrary

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, consider removing the egg-arbitrary package from your project until a secure version is released. You can do this by running the command: 'npm uninstall egg-arbitrary'. Additionally, review your codebase for any dependencies that may rely on this package and assess their impact.

Conclusion

The egg-arbitrary package contains a critical vulnerability due to malicious code that can lead to severe security risks. Users are advised to update the package as soon as a patched version is available and to consider removing it temporarily to safeguard their applications. Regular monitoring and vulnerability checks are essential for maintaining application security.

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FAQ

The egg-arbitrary package is an npm module used for executing arbitrary code within Node.js applications.

The vulnerability allows malicious code execution, which can lead to data breaches, unauthorized access, and system compromise.

Currently, there is no patched version available. Users should monitor the package repository for updates.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without signing up.

As a temporary measure, consider removing the package from your project and reviewing any dependencies that may rely on it.

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

How To Fix

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

npm uninstall egg-arbitrary

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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