Critical Malicious Code Vulnerability in struct-logger Package
Summary
MAL-2025-4405: Malicious code in struct-logger (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The struct-logger package is an npm library designed for structured logging in Node.js applications. It allows developers to log messages in a structured format, making it easier to analyze logs and troubleshoot issues. However, this package has been compromised, leading to significant security concerns for any application utilizing it.
Vulnerability Detail
The vulnerability originates from malicious code embedded within the struct-logger package. This code can fully compromise any computer that has the package installed or running, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of the code falls under CWE-506, which indicates the presence of embedded malicious code. Users are advised to treat any system with this package as compromised.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall struct-loggerIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, you can prevent the execution of the struct-logger package by removing it from your project dependencies. Use the following command to uninstall it: npm uninstall struct-logger. However, be aware that this does not guarantee the removal of all malicious software that may have been installed.
Conclusion
The struct-logger package has been identified as containing malicious code that poses a serious security risk. Users must take immediate action to remove the package and secure their systems. Monitoring tools like Vulert can help keep your applications safe from future vulnerabilities.
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FAQ
The struct-logger package is an npm library used for structured logging in Node.js applications, allowing developers to log messages in a format that is easier to analyze.
The package was compromised by the introduction of malicious code that can fully compromise any system where it is installed or running.
You should immediately uninstall the struct-logger package and rotate any secrets or keys stored on the affected system.
Currently, there is no patched version available. Users are advised to remove the package entirely.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities in your software using just the package-lock.json file. You can also check your application for vulnerabilities using the Vulert playground without any signup.
