Critical Malicious Code Vulnerability in primexuu-libsignal Package

primexuu-libsignal Updated 03 Mar 2026

Summary

03/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1153: Malicious code in primexuu-libsignal (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The primexuu-libsignal package is an npm library designed for signal processing and communication functionalities. It is utilized in various applications for secure messaging and data transmission. However, this package has been compromised, embedding malicious code that poses significant security risks to any system using it.

Vulnerability Detail

The vulnerability originates from the presence of malicious code within the primexuu-libsignal package. This code can fully compromise any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The implications are severe, as attackers may gain complete control over the affected systems, leading to potential data breaches and loss of confidentiality.

How To Fix

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

npm uninstall primexuu-libsignal

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, it is recommended to rotate all secrets and keys stored on the affected computer from a different, secure machine. This step is essential to mitigate any potential damage caused by the malicious code.

Conclusion

The primexuu-libsignal package contains a critical vulnerability due to embedded malicious code, posing severe risks to any system using it. Immediate action is required to remove the package and secure sensitive information. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.

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FAQ

The primexuu-libsignal package is an npm library used for secure messaging and data transmission, but it has been compromised with malicious code.

If you have the primexuu-libsignal package installed, your system is likely compromised. It is advisable to check your package-lock.json file for its presence.

Immediately rotate all sensitive data, secrets, and keys from a secure machine to prevent unauthorized access.

Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file.

You can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without any signup.

How To Fix

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

npm uninstall primexuu-libsignal

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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