Malicious Code Vulnerability in shallow_scallop-biggestdev: Exploitation of npm Registry

shallow_scallop-biggestdev Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-108603: Malicious code in shallow_scallop-biggestdev (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package 'shallow_scallop-biggestdev' is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to exploit the npm registry by flooding it with derivative packages. These packages are designed to inflate developer reputation scores through automated publishing scripts, which can lead to significant pollution of the npm registry and compromise the integrity of the ecosystem.

Vulnerability Detail

The vulnerability originates from the malicious intent behind the 'shallow_scallop-biggestdev' package, which is linked to the tea.xyz token reward campaign. This package contains scripts that modify the package.json file to remove private flags and change version numbers, allowing it to generate and publish numerous derivative packages with random names. The ramifications include the potential for developers to inadvertently use compromised packages, leading to security risks and a degraded npm registry.

How To Fix

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

npm uninstall shallow_scallop-biggestdev

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a workaround, you can use the following command to uninstall the malicious package: npm uninstall shallow_scallop-biggestdev. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities in real-time.

Conclusion

The 'shallow_scallop-biggestdev' package poses a significant risk due to its malicious code designed to exploit the npm registry. It is crucial for developers to remove this package and utilize tools like Vulert to ensure their applications remain secure from such vulnerabilities.

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FAQ

It is an npm package identified as part of a malicious campaign aimed at flooding the npm registry with derivative packages.

Using this package can lead to security risks and potential exploitation of your application due to its malicious nature.

You should uninstall the package immediately and monitor your project for any other vulnerabilities.

Yes, you can use the Vulert playground at Vulert Scanner to check for vulnerabilities without needing to sign up.

Vulert is a tool that monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file.

How To Fix

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

npm uninstall shallow_scallop-biggestdev

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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