Malicious Code Injection in regular_meadowlark_z3n: A Threat to npm Packages

regular_meadowlark_z3n Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-107828: Malicious code in regular_meadowlark_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package regular_meadowlark_z3n is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development of applications by providing reusable code. However, it has been identified as part of a malicious campaign that aims to exploit npm's publishing capabilities, leading to potential security risks for developers and their projects.

Vulnerability Detail

The vulnerability in regular_meadowlark_z3n stems from its association with the tea.xyz token reward campaign. This package contains malicious scripts that modify the package.json file to remove private flags, alter version numbers, and generate random package names. The scripts continuously republish these variants, polluting the npm registry and potentially compromising the integrity of other packages. The origin of this issue is linked to automated scripts designed to inflate developer reputation scores for token rewards, posing significant risks to the npm ecosystem.

How To Fix

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

npm uninstall regular_meadowlark_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, you can prevent the installation of this malicious package by using npm's package-lock.json to monitor your dependencies. Ensure that your project does not include regular_meadowlark_z3n in its dependencies. You can also use the following command to audit your packages for vulnerabilities: 'npm audit'.

Conclusion

The regular_meadowlark_z3n package poses a significant threat due to its malicious code designed to exploit the npm ecosystem. It is crucial for developers to be vigilant, regularly audit their dependencies, and utilize tools like Vulert to safeguard their projects against such vulnerabilities.

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FAQ

regular_meadowlark_z3n is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.

The vulnerability can lead to the pollution of the npm registry and may compromise the integrity of your project's dependencies, potentially introducing security risks.

You should uninstall the package immediately using 'npm uninstall regular_meadowlark_z3n' and audit your project for any other vulnerabilities.

Regularly update your dependencies, use npm audit to check for vulnerabilities, and consider using tools like Vulert to monitor your projects for open-source vulnerabilities.

Vulert is a tool that monitors and alerts in real-time for open-source vulnerabilities in your software using just package-lock.json. You can check if your application is affected by vulnerabilities without any signup at the Vulert playground.

How To Fix

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

npm uninstall regular_meadowlark_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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