Malicious Code Injection in universal_barnacle_z3n: A Threat to npm Packages

universal_barnacle_z3n Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-91532: Malicious code in universal_barnacle_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package 'universal_barnacle_z3n' is part of a series of npm packages that emerged during the tea.xyz token reward campaign. These packages are designed to inflate developer reputation scores by automatically generating and publishing derivative packages with randomized names. This behavior not only clutters the npm registry but also poses significant security risks to developers and users relying on these packages.

Vulnerability Detail

The vulnerability in 'universal_barnacle_z3n' stems from its malicious code that modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior is part of a broader scheme to pollute the npm registry, potentially leading to the installation of compromised packages by unsuspecting developers. The malicious payload can result in unauthorized access to sensitive data and the proliferation of insecure software components.

How To Fix

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

npm uninstall universal_barnacle_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 measure, avoid using the 'universal_barnacle_z3n' package and consider replacing it with a reputable alternative. Regularly audit your npm packages to ensure no malicious packages are included in your project.

Conclusion

The 'universal_barnacle_z3n' package poses a significant threat due to its malicious code designed to manipulate npm package metadata. It is essential for developers to remove this package from their projects and utilize tools like Vulert to monitor for vulnerabilities in their dependencies. Staying vigilant and proactive can help safeguard your applications from similar threats.

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FAQ

'universal_barnacle_z3n' is an npm package that has been identified as malicious, designed to manipulate package metadata and publish derivative packages.

This vulnerability can lead to the installation of compromised packages, potentially exposing your project to security risks and data breaches.

Immediately uninstall the package using 'npm uninstall universal_barnacle_z3n' and audit your project for any other potentially malicious packages.

Regularly audit your dependencies, use tools like Vulert to monitor for vulnerabilities, and only install packages from trusted sources.

Vulert is a tool that monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file. You can check if your application is affected by vulnerabilities without needing to install or access the code.

How To Fix

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

npm uninstall universal_barnacle_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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