Malicious Code Injection in collective_ladybug_z3n: npm Package Vulnerability

collective_ladybug_z3n Updated 24 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-100660: Malicious code in collective_ladybug_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The 'collective_ladybug_z3n' package is part of the npm ecosystem, which is widely used for JavaScript package management. This package is implicated in a malicious campaign that aims to inflate developer reputation scores through the creation of derivative packages. It is designed to automatically publish variants with randomized names, potentially leading to a polluted npm registry and compromised developer environments.

Vulnerability Detail

This vulnerability originates from a malicious payload embedded within the 'collective_ladybug_z3n' package. The payload modifies the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior not only compromises the integrity of the npm registry but also poses a risk to developers who may unknowingly install these malicious variants, leading to potential security breaches and loss of trust in the ecosystem.

How To Fix

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

npm uninstall collective_ladybug_z3n

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 'collective_ladybug_z3n' package from your project until a secure version is released. You can do this by executing the command: 'npm uninstall collective_ladybug_z3n'. Additionally, monitor your package-lock.json file for any unauthorized changes.

Conclusion

The 'collective_ladybug_z3n' package has been identified as a vector for malicious code injection, posing significant risks to developers and their projects. It is essential to take immediate action by updating or removing the package and utilizing monitoring tools like Vulert to safeguard against future vulnerabilities.

See every vulnerability recorded for collective_ladybug_z3n →

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FAQ

It is an npm package that has been identified as part of a malicious campaign to inflate developer reputation scores through the automatic publication of derivative packages.

The vulnerability can lead to the installation of malicious packages that may compromise your project's security and integrity, potentially allowing unauthorized access or data breaches.

If you have installed 'collective_ladybug_z3n', it is crucial to uninstall it immediately and monitor your project for any unauthorized changes.

You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using just your package-lock.json. You can check your application for vulnerabilities using the Vulert playground at Vulert Scanner.

Regularly update your packages, utilize tools like Vulert for monitoring, and review package dependencies for any known vulnerabilities before installation.

How To Fix

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

npm uninstall collective_ladybug_z3n

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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