Malicious Code Detected in cs-config-loader: A Critical Security Alert

cs-config-loader Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-17771: Malicious code in cs-config-loader (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The cs-config-loader package is an npm library designed to facilitate the loading and configuration of various settings in JavaScript applications. It is commonly used by developers to streamline their configuration processes. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability stems from the inclusion of malicious code within the cs-config-loader package. This code can potentially compromise the integrity of applications that depend on it, leading 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 risks.

How To Fix

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

npm uninstall cs-config-loader

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, consider removing the cs-config-loader package from your project until a secure version is released. You can do this by executing the following command: 'npm uninstall cs-config-loader'. This will help prevent any potential exploitation of the malicious code.

Conclusion

The discovery of malicious code in the cs-config-loader package poses a significant threat to applications that utilize it. Immediate action is required to update or remove the package to safeguard your projects. Regular monitoring and vulnerability assessments are essential to maintain application security.

See every vulnerability recorded for cs-config-loader →

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FAQ

cs-config-loader is an npm package used for loading and managing configuration settings in JavaScript applications.

The malicious code was identified through security assessments conducted by Amazon Inspector, which flagged the cs-config-loader package for containing harmful elements.

Using cs-config-loader with the malicious code can lead to unauthorized access, data breaches, and other security vulnerabilities in your application.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file. Visit https://vulert.com for more information.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

How To Fix

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

npm uninstall cs-config-loader

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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