Malicious Code Detected in fs-filter Package - Security Alert
Summary
MAL-2025-21007: Malicious code in fs-filter (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The fs-filter package is a tool used in the Node.js ecosystem, primarily designed to filter file system operations based on specified criteria. It is commonly utilized in various applications to enhance file handling capabilities. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that depend on it.
Vulnerability Detail
The vulnerability in the fs-filter package arises from the inclusion of malicious code that can compromise the integrity and security of applications using this package. This code may allow unauthorized access to sensitive data, execute arbitrary commands, or disrupt normal operations. The malicious code was introduced in version 0 and affects all subsequent versions, making it critical for users to address this issue promptly.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall fs-filterIf 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 removing the fs-filter package from your project if it is not essential. You can do this by executing the command: 'npm uninstall fs-filter'. Additionally, review your application's dependencies to identify any alternative packages that provide similar functionality without the associated risks.
Conclusion
The fs-filter package has been identified as containing malicious code, posing significant security risks to applications that utilize it. Users are urged to update or remove the package to mitigate potential threats. Regular monitoring of dependencies and utilizing tools like Vulert can help maintain application security.
See every vulnerability recorded for fs-filter →
FAQ
The fs-filter package is a Node.js utility that allows developers to filter file system operations based on specific criteria, enhancing file handling capabilities in applications.
The malicious code was introduced in version 0 of the fs-filter package, affecting all subsequent versions. It is crucial to monitor updates and patches from the package maintainers.
Using the compromised fs-filter package can lead to unauthorized access to sensitive data, execution of arbitrary commands, and disruption of application functionality.
You can use Vulert, a tool that monitors and alerts for open-source vulnerabilities in your software. By analyzing your package-lock.json file, Vulert can provide real-time alerts. You can also check your application using the Vulert playground at Vulert Scanner without requiring signup.
If immediate updates are not possible, consider removing the fs-filter package from your project as a temporary measure and look for alternative packages that offer similar functionalities.
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