Malicious Code Vulnerability in virtualize-cache-cloud-cat-slow Package

Summary

13/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-190161: Malicious code in virtualize-cache-cloud-cat-slow (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The virtualize-cache-cloud-cat-slow package is part of the npm ecosystem, designed for caching functionalities in cloud environments. However, it has been identified as part of a malicious campaign that exploits npm's publishing mechanisms. This package, like others in the campaign, is used to inflate developer reputation scores through automated scripts that publish numerous derivative packages.

Vulnerability Detail

The vulnerability originates from the package's involvement in the tea.xyz token reward campaign, which floods the npm registry with malicious packages. The malicious code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of these variants. This not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages, potentially leading to security breaches in their applications.

How To Fix

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

npm uninstall virtualize-cache-cloud-cat-slow

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 virtualize-cache-cloud-cat-slow package and look for alternative packages that provide similar caching functionalities without the associated risks.

Conclusion

The virtualize-cache-cloud-cat-slow package has been identified as a malicious entity within the npm ecosystem, posing significant risks to developers and their applications. It is crucial to remove this package and monitor your dependencies for any vulnerabilities to maintain the security of your projects.

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FAQ

The primary risk is that it contains malicious code that can modify your project's package.json file and republish itself under different names, potentially leading to security vulnerabilities.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. By simply using your package-lock.json file, you can check for vulnerabilities without any installation. Visit the Vulert playground at Vulert Scanner.

If you have installed the virtualize-cache-cloud-cat-slow package, you should uninstall it immediately using the command: npm uninstall virtualize-cache-cloud-cat-slow.

Yes, you should look for other reputable caching packages in the npm registry that do not have known vulnerabilities.

Regularly audit your dependencies using tools like Vulert and keep your packages updated to their latest versions to minimize the risk of vulnerabilities.

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How To Fix

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

npm uninstall virtualize-cache-cloud-cat-slow

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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