Malicious Code Injection in formidable_silverfish_0xrequest Package

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-102871: Malicious code in formidable_silverfish_0xrequest (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The formidable_silverfish_0xrequest package is part of the npm ecosystem, typically used for handling file uploads in Node.js applications. However, this package has been identified as part of a malicious campaign that floods the npm registry with harmful scripts designed to manipulate package metadata and inflate developer reputation scores.

Vulnerability Detail

The vulnerability originates from a malicious payload embedded within the formidable_silverfish_0xrequest package. This payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to pollution of the npm registry. The ramifications include potential security risks for developers who unknowingly use this package, as it can lead to unauthorized access or manipulation of their projects.

How To Fix

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

npm uninstall formidable_silverfish_0xrequest

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, consider using alternative packages for file uploads that are known to be secure and have a good reputation in the community. Always verify the integrity of packages before installation.

Conclusion

The formidable_silverfish_0xrequest package poses a significant security risk due to its malicious code designed to manipulate npm registry data. It is essential to remove this package from your projects and monitor for vulnerabilities using tools like Vulert to ensure the security of your applications.

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FAQ

It is an npm package used for handling file uploads in Node.js applications, but it has been compromised with malicious code.

You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities. Check your application using the Vulert playground at Vulert Scanner.

Using this package can lead to unauthorized access to your project, manipulation of your package metadata, and potential security breaches.

Regularly audit your dependencies and use tools like Vulert to monitor for vulnerabilities in real-time.

Immediately uninstall the package and replace it with a secure alternative. Review your project for any potential security issues.

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

How To Fix

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

npm uninstall formidable_silverfish_0xrequest

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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