Malicious Code Injection in teagood-yakuza48: A Threat to npm Ecosystem

teagood-yakuza48 Updated 26 Nov 2025

Summary

12/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-168006: Malicious code in teagood-yakuza48 (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

teagood-yakuza48 is an npm package that is part of the tea.xyz token reward campaign. It is designed to facilitate token rewards through various scripts that automate the publishing of derivative packages. However, this package has been identified as malicious, containing scripts that manipulate package metadata and flood the npm registry with unwanted variants.

Vulnerability Detail

The vulnerability stems from malicious code embedded within the teagood-yakuza48 package. This code is designed to modify the package.json file by removing private flags, altering version numbers, and generating random package names. The result is a proliferation of derivative packages that can mislead developers and inflate reputation scores for token rewards. The origin of this vulnerability is linked to the tea.xyz campaign, which aims to exploit npm's publishing mechanisms.

How To Fix

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

npm uninstall teagood-yakuza48

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 avoid using the teagood-yakuza48 package and any other packages that are part of the tea.xyz campaign. Regularly audit your project's dependencies using tools like npm audit to identify and mitigate potential vulnerabilities.

Conclusion

The discovery of malicious code in the teagood-yakuza48 package highlights the importance of vigilance when managing npm packages. By understanding the nature of this vulnerability and taking appropriate action, developers can protect their projects from potential harm.

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FAQ

teagood-yakuza48 is an npm package associated with the tea.xyz token reward campaign, which has been identified as containing malicious code.

The malicious code modifies your package.json file, removes private flags, and floods the npm registry with unwanted packages, potentially harming your project's integrity.

You should uninstall the package immediately using the command npm uninstall teagood-yakuza48 and check for any dependencies that may be affected.

You can use tools like Vulert, which monitors your package-lock.json for open-source vulnerabilities in real-time. You can check your application using the Vulert playground without any signup.

Yes, the tea.xyz token reward campaign has multiple packages that may contain similar malicious scripts. It's advisable to audit your dependencies regularly.

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How To Fix

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

npm uninstall teagood-yakuza48

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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