Critical Malicious Code Vulnerability in arc-cli-fc Package

arc-cli-fc Updated 25 Nov 2025

Summary

24/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-191064: Malicious code in arc-cli-fc (npm). Affects arc-cli-fc versions 1.0.1. No fix is published. How to fix ↓

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Background

The arc-cli-fc package is a command-line interface tool designed for developers to facilitate various functionalities within their applications. It is part of the npm ecosystem, which is widely used for managing JavaScript packages. However, this package has been identified to contain malicious code that compromises the security of any system it is installed on.

Vulnerability Detail

The vulnerability stems from the presence of embedded malicious code within the arc-cli-fc package. This code can lead to full system compromise, allowing unauthorized access to sensitive information such as secrets and keys stored on the affected machine. The origin of this vulnerability is linked to a malicious actor who has injected harmful code into the package, making it a significant risk for users who have installed it. The ramifications of this vulnerability are severe, as it can lead to data breaches and loss of control over the affected systems.

How To Fix

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

npm uninstall arc-cli-fc

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

Currently, there are no effective workarounds to mitigate the risks posed by the malicious code in the arc-cli-fc package. The only recommended action is to uninstall the package and secure any sensitive information.

Conclusion

The arc-cli-fc package has been identified as containing malicious code that poses a significant security risk. Users are strongly advised to uninstall the package immediately and secure their sensitive information. Continuous monitoring for vulnerabilities is essential to maintain application security.

See every vulnerability recorded for arc-cli-fc →

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FAQ

The arc-cli-fc package is a command-line interface tool used in JavaScript development for various application functionalities.

The malicious code can lead to full system compromise, allowing unauthorized access to sensitive data and control over your machine.

You should immediately uninstall the package using the command npm uninstall arc-cli-fc and rotate any sensitive information stored on your system.

No, there is currently no patched version available for the arc-cli-fc package. Complete removal is necessary.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file. You can check if your application is affected by this vulnerability using the Vulert playground at Vulert Scanner without any signup.

How To Fix

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

npm uninstall arc-cli-fc

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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