Malicious Code Detected in fanarena-common Package - Version 99.9.1
Summary
MAL-2026-18063: Malicious code in fanarena-common (npm). Affects fanarena-common versions 99.9.1. No fix is published. How to fix ↓
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Background
The fanarena-common package is a library used in Node.js applications, primarily for facilitating common functionalities across various fan-related applications. It is designed to streamline development by providing reusable code components. However, version 99.9.1 has been flagged for malicious behavior, raising concerns about its security and the integrity of applications that depend on it.
Vulnerability Detail
The vulnerability stems from the fanarena-common package communicating with a domain known for malicious activities. This behavior poses significant risks, including data breaches, unauthorized access, and potential exploitation of the systems utilizing this package. The identification of this malicious code was made by the OpenSSF Package Analysis project, which highlighted the package's association with harmful online activities.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall fanarena-commonIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
If updating the package is not immediately feasible, consider removing the fanarena-common package from your project and replacing it with an alternative library that offers similar functionalities without the associated risks.
Conclusion
The fanarena-common package version 99.9.1 has been identified as malicious due to its communication with a harmful domain. It is essential to update to a secure version or find an alternative to mitigate risks associated with this vulnerability. Monitoring tools like Vulert can assist in keeping your application safe from such vulnerabilities.
See every vulnerability recorded for fanarena-common →
FAQ
fananera-common is a Node.js library designed to provide common functionalities for fan-related applications.
The malicious behavior was identified by the OpenSSF Package Analysis project, which flagged version 99.9.1 for communicating with a domain linked to malicious activities.
Using the compromised version can lead to data breaches, unauthorized access, and exploitation of your application, potentially compromising user data and system integrity.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using just the package-lock.json file. You can check your application for vulnerabilities at the Vulert playground without any signup.
If immediate updates are not possible, consider removing the fanarena-common package and replacing it with a safer alternative until a patch is available.
