Malicious Code Injection in mushy_llama_z3n Package

mushy_llama_z3n Updated 24 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-106039: Malicious code in mushy_llama_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The mushy_llama_z3n package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, often with randomized names, to inflate developer reputation scores for token rewards. Its functionality is compromised by malicious scripts that alter its core files.

Vulnerability Detail

The vulnerability in the mushy_llama_z3n package stems from malicious code that modifies the package.json file to remove private flags, changes version numbers, and generates random package names. This behavior is intended to pollute the npm registry by continuously republishing variants, which can lead to security risks for developers who inadvertently use these compromised packages. The origin of this vulnerability is linked to the tea.xyz token reward campaign, which exploits npm's publishing mechanisms.

How To Fix

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

npm uninstall mushy_llama_z3n

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, you can remove the mushy_llama_z3n package from your project by executing: npm uninstall mushy_llama_z3n. This will prevent the execution of any malicious code until a secure version is available.

Conclusion

The mushy_llama_z3n package contains a significant vulnerability that allows for malicious code injection, posing risks to developers and their projects. It is crucial to take immediate action by updating or removing the package and using tools like Vulert to monitor for vulnerabilities.

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FAQ

The mushy_llama_z3n package is an npm package associated with the tea.xyz token reward campaign, designed to automate the generation and publication of derivative packages.

The vulnerability can lead to the introduction of malicious code into your project, potentially compromising its security and integrity.

If you have installed the mushy_llama_z3n package, it is recommended to uninstall it immediately and check for any updates or patches.

You can use tools like Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities without requiring code access or installation.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

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How To Fix

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

npm uninstall mushy_llama_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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