Malicious Code Injection in underground_eagle_z3n Package

underground_eagle_z3n Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-97106: Malicious code in underground_eagle_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The underground_eagle_z3n package is part of the npm ecosystem, primarily utilized for various JavaScript applications. This package has been associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with malicious packages. The primary functionality of this package is to serve as a tool for developers, but its recent exposure to malicious code has raised significant concerns regarding its integrity and security.

Vulnerability Detail

The vulnerability in the underground_eagle_z3n package stems from its malicious payload that modifies the package.json file. This payload removes private flags, alters version numbers, and generates random package names, leading to the automatic generation and publication of derivative packages. This behavior not only inflates developer reputation scores for token rewards but also pollutes the npm registry, potentially compromising other packages and applications that rely on it. The origin of this vulnerability is linked to the tea.xyz token reward campaign, which has been identified as a source of numerous malicious packages.

How To Fix

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

npm uninstall underground_eagle_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 prevent the underground_eagle_z3n package from being used in your project by removing it from your package.json file and running npm install to update your dependencies. Additionally, you can use the following command to uninstall the package: npm uninstall underground_eagle_z3n.

Conclusion

The underground_eagle_z3n package has been identified as containing malicious code that poses a significant risk to applications using it. It is crucial for developers to take immediate action by updating or removing the package to safeguard their projects from potential threats. Utilizing tools like Vulert can further enhance security by providing real-time monitoring for vulnerabilities.

See every vulnerability recorded for underground_eagle_z3n →

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FAQ

The underground_eagle_z3n package is an npm package that has been linked to malicious activities, specifically related to the tea.xyz token reward campaign.

This vulnerability can compromise your application's integrity by allowing malicious code to execute, potentially leading to data breaches or unauthorized access.

If you are using the underground_eagle_z3n package, you should update it to the latest patched version or remove it from your project immediately.

You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities in your software. You can check your application against known vulnerabilities using the Vulert playground.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability 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 underground_eagle_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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