Critical Malicious Code Vulnerability in narrow-array Package

narrow-array Updated 10 Feb 2026

Summary

10/02/2026
CRITICAL
No i
Critical
Not published

MAL-2026-827: Malicious code in narrow-array (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The narrow-array package is a utility in the npm ecosystem designed for efficient array manipulation. It provides various functionalities that allow developers to handle arrays with optimized performance. However, it has been found to contain malicious code, posing significant security risks to any system using this package.

Vulnerability Detail

The vulnerability stems from the presence of embedded malicious code within the narrow-array package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of this code was identified through a security advisory, indicating that the package should be considered fully compromised. Users are advised to take immediate action as the installation of this package may lead to a complete loss of control over the affected system.

How To Fix

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

npm uninstall narrow-array

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

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Workaround

As a workaround, ensure that the narrow-array package is uninstalled from your project by running the command: npm uninstall narrow-array. Additionally, monitor your system for any unusual activity that may indicate further compromise.

Conclusion

The narrow-array package has been identified as containing malicious code, posing a serious security threat to any system using it. Immediate action is required to remove the package and secure sensitive information. Utilize tools like Vulert to monitor for vulnerabilities in your projects.

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FAQ

The narrow-array package is an npm utility for efficient array manipulation, but it has been compromised with malicious code.

If you have the narrow-array package installed, your system is likely compromised. Use tools like Vulert to check for vulnerabilities.

Immediately uninstall the narrow-array package and rotate any sensitive information stored on your system.

Currently, there is no patched version available. The best course of action is to remove the package entirely.

Vulert monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file, providing real-time insights.

How To Fix

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

npm uninstall narrow-array

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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