Malicious Code Detected in genlog Package - Security Alert

genlog Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-21322: Malicious code in genlog (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The genlog package is an npm library designed for logging and generating log files in JavaScript applications. It is commonly used by developers to streamline logging processes and improve application debugging. However, recent findings have revealed that this package contains malicious code, posing a significant security risk to applications that utilize it.

Vulnerability Detail

The vulnerability in the genlog 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 harmful actions within the affected systems. The malicious nature of this code was identified by security researchers, raising concerns about the integrity of the package and its potential impact on users.

How To Fix

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

npm uninstall genlog

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 genlog package from your project until a secure version is released. You can uninstall it using the command: npm uninstall genlog. This will help mitigate the risk associated with the malicious code.

Conclusion

The discovery of malicious code in the genlog package highlights the importance of regularly monitoring and updating dependencies in software projects. By taking proactive measures, such as updating to patched versions and utilizing tools like Vulert, developers can protect their applications from potential security threats.

See every vulnerability recorded for genlog →

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FAQ

The genlog package is an npm library used for logging and generating log files in JavaScript applications.

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

You can use Vulert, a tool that monitors and alerts for open-source vulnerabilities. Simply upload your package-lock.json file to check for vulnerabilities in your application.

Yes, you can temporarily uninstall the genlog package from your project to mitigate the risk until a secure version is available.

Using tools like Vulert allows you to monitor your dependencies for vulnerabilities in real-time without requiring code access or installation.

How To Fix

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

npm uninstall genlog

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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