Malicious Code Injection in quintessential_wolf_z3n Package

quintessential_wolf_z3n Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-107672: Malicious code in quintessential_wolf_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The quintessential_wolf_z3n package is part of the npm ecosystem, primarily used for various JavaScript applications. However, it has been identified as part of a malicious campaign that floods the npm registry with derivative packages. These packages are designed to inflate developer reputation scores through automated publishing scripts, which can lead to significant security risks for developers and users alike.

Vulnerability Detail

The vulnerability in the quintessential_wolf_z3n package stems from its involvement in a malicious campaign that modifies the package.json file to remove private flags and change version numbers. This allows the package to generate random names and continuously republish variants, polluting the npm registry. The malicious payload can lead to unauthorized access, potential data breaches, and compromise the integrity of applications relying on this package.

How To Fix

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

npm uninstall quintessential_wolf_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, avoid using the quintessential_wolf_z3n package and consider using alternative packages that provide similar functionality without the associated risks. Regularly audit your package dependencies to ensure they are secure.

Conclusion

The quintessential_wolf_z3n package poses a significant security risk due to its malicious code injection. It is essential to remove this package from your projects and monitor your dependencies for vulnerabilities. Utilizing tools like Vulert can help maintain the security of your applications.

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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 automated publishing.

The vulnerability can lead to unauthorized access and data breaches, compromising the integrity of your application.

You should uninstall the quintessential_wolf_z3n package immediately and check for any dependent packages that may also need to be addressed.

Yes, Vulert can monitor and alert in real-time for open-source vulnerabilities using just your package-lock.json file.

You can use the Vulert playground at Vulert Scanner to check if your application is affected without requiring any signup.

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How To Fix

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

npm uninstall quintessential_wolf_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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