Malicious Code Detected in fast-bash-tree-reject-omicron Package

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-20235: Malicious code in fast-bash-tree-reject-omicron (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The fast-bash-tree-reject-omicron package is a Node.js library designed for parsing and manipulating bash tree structures. It is utilized in various applications for its ability to handle complex bash scripts efficiently. However, this package has been found to contain malicious code, posing a significant risk to users who integrate it into their projects.

Vulnerability Detail

The vulnerability in the fast-bash-tree-reject-omicron package stems from the inclusion of malicious code that can compromise the security of applications using this library. This code can lead to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action to mitigate the risks associated with this vulnerability.

How To Fix

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

npm uninstall fast-bash-tree-reject-omicron

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, users can avoid using the fast-bash-tree-reject-omicron package and look for alternative libraries that provide similar functionality without the associated risks.

Conclusion

The fast-bash-tree-reject-omicron package has been identified as containing malicious code, posing a significant risk to users. It is crucial to take immediate action by removing the package and seeking alternatives to ensure the security of your applications.

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FAQ

It is a Node.js library used for parsing and manipulating bash tree structures.

The package contains code that can lead to unauthorized access and potential data breaches.

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

Currently, there is no patched version available for the fast-bash-tree-reject-omicron package.

It is recommended to remove the package and replace it with a secure alternative immediately.

How To Fix

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

npm uninstall fast-bash-tree-reject-omicron

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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