Malicious Code Detected in finnbrain Package - Security Alert

finnbrain Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-20575: Malicious code in finnbrain (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The finnbrain package is an npm library designed for various functionalities within JavaScript applications. It is utilized by developers for its ease of integration and robust features. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that rely on it.

Vulnerability Detail

The vulnerability in the finnbrain package stems from the inclusion of malicious code that can compromise the integrity and security of applications using this library. This code may lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The vulnerability was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action.

How To Fix

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

npm uninstall finnbrain

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 isolate the usage of the finnbrain package in a controlled environment or sandbox to minimize potential risks until a fix is implemented. However, this does not eliminate the vulnerability and is not a long-term solution.

Conclusion

The discovery of malicious code in the finnbrain package poses a serious threat to applications utilizing it. Users are urged to take immediate action by uninstalling the package and seeking secure alternatives. Continuous monitoring for vulnerabilities is essential to maintain application security.

See every vulnerability recorded for finnbrain →

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FAQ

The malicious code can potentially allow unauthorized access to sensitive data or system resources, posing a significant security threat.

You can use Vulert to monitor and alert for open-source vulnerabilities in your software. By analyzing your package-lock.json file, Vulert can identify if your application is affected.

The best mitigation strategy is to uninstall the finnbrain package and replace it with a secure alternative. Avoid using it until a patched version is released.

Immediately remove the finnbrain package from your application and assess any potential security breaches. Consider deploying a secure alternative.

You can visit Vulert's website for real-time monitoring and alerts regarding open-source vulnerabilities, or check the official npm advisory database.

How To Fix

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

npm uninstall finnbrain

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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