Critical Malicious Code Vulnerability in 1kzr Package

1kzr Updated 07 Jan 2026

Summary

07/01/2026
CRITICAL
No i
Critical
Not published

MAL-2026-107: Malicious code in 1kzr (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The 1kzr package is a Node.js library available through npm, designed for various functionalities within JavaScript applications. However, it has been identified as containing malicious code that compromises the security of any system where it is installed. This vulnerability poses a significant risk to developers and organizations using this package, as it can lead to unauthorized access and data breaches.

Vulnerability Detail

The vulnerability originates from the presence of embedded malicious code within the 1kzr package. This code can fully compromise any computer that has the package installed, allowing external entities to gain control over the system. The ramifications include potential data theft, unauthorized access to sensitive information, and the installation of additional malicious software. Users are advised to treat any system with this package as compromised and take immediate action to secure their data.

How To Fix

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

npm uninstall 1kzr

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 →

Workaround

As a workaround, ensure that you do not run any applications that depend on the 1kzr package. If you must continue development, consider using alternative packages that provide similar functionality without the security risks.

Conclusion

The discovery of malicious code within the 1kzr package highlights the importance of vigilance in managing open-source dependencies. Users must act swiftly to remove the package and secure their systems to prevent potential data breaches and unauthorized access.

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FAQ

Immediately uninstall the package using the command npm uninstall 1kzr and rotate any sensitive keys or secrets stored on the affected machine.

You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

Keeping the 1kzr package installed poses significant risks, including unauthorized access to your system, data theft, and potential installation of additional malicious software.

The best mitigation strategy is to remove the package entirely and use alternative packages that do not have known vulnerabilities.

While many npm packages are safe, it is essential to conduct thorough reviews and use tools like Vulert to monitor for vulnerabilities in your dependencies.

How To Fix

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

npm uninstall 1kzr

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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