Malicious Code Detected in avalon-cli: A Critical Security Risk

avalon-cli Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-15166: Malicious code in avalon-cli (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

avalon-cli is a command-line interface tool designed for managing and automating tasks in development environments. It is widely used in JavaScript projects for its ease of use and powerful features. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users and their applications.

Vulnerability Detail

The vulnerability originates from the inclusion of malicious code within the avalon-cli package. This code can potentially compromise the integrity of applications that utilize this package, leading to unauthorized access, data breaches, or other harmful actions. The malicious nature of the code means that it can execute harmful operations without the user's consent, making it a severe threat to security.

How To Fix

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

npm uninstall avalon-cli

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, users can remove the avalon-cli package from their project until a secure version is released. This can be done using the command: 'npm uninstall avalon-cli'. Consider using alternative packages that offer similar functionality without the associated risks.

Conclusion

The discovery of malicious code in the avalon-cli package highlights the importance of maintaining secure coding practices and regularly updating dependencies. Users are urged to take immediate action to protect their applications from potential threats.

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FAQ

The malicious code can execute harmful operations that may compromise application security and user data.

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As a temporary measure, consider uninstalling the package until a secure version is available.

While specific exploits have not been detailed, the presence of malicious code indicates a high risk of exploitation.

Regularly check vulnerability databases and consider using tools like Vulert to receive real-time alerts for any new vulnerabilities.

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How To Fix

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

npm uninstall avalon-cli

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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