Malicious Code Injection in anthony-validator-catalyst Package

anthony-validator-catalyst Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-99486: Malicious code in anthony-validator-catalyst (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The anthony-validator-catalyst package is part of the npm ecosystem, primarily used for validating transactions in decentralized applications. It is designed to enhance the functionality of applications by providing validation mechanisms. However, this package has been identified as part of a malicious campaign that exploits npm's publishing capabilities, leading to potential security risks for developers and users alike.

Vulnerability Detail

The vulnerability originates from the anthony-validator-catalyst package, which is linked to a broader malicious campaign targeting npm. This package contains scripts that automatically modify the package.json file to remove private flags, alter version numbers, and generate random package names. The malicious payload continuously republishes these variants, polluting the npm registry and potentially compromising the integrity of applications that rely on this package. The ramifications include inflated developer reputation scores and the risk of unintentional use of compromised packages in production environments.

How To Fix

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

npm uninstall anthony-validator-catalyst

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 remove the anthony-validator-catalyst package from your project if it is not essential. Use the following command to uninstall the package: npm uninstall anthony-validator-catalyst. Additionally, consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The anthony-validator-catalyst package has been identified as containing malicious code that can compromise applications using it. It is essential for developers to take immediate action by updating or removing the package to safeguard their projects. Utilizing tools like Vulert can help in monitoring and alerting for such vulnerabilities in real-time.

See every vulnerability recorded for anthony-validator-catalyst →

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FAQ

The anthony-validator-catalyst package is an npm package used for validating transactions in decentralized applications.

The vulnerability can lead to the inclusion of malicious code in your application, potentially compromising its security and integrity.

If you have used the anthony-validator-catalyst package, it is crucial to update or remove it from your project immediately.

Yes, you can use tools like Vulert, which monitors your package-lock.json for open-source vulnerabilities in real-time without requiring code access.

You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.

How To Fix

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

npm uninstall anthony-validator-catalyst

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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