Critical Malicious Code Vulnerability in eslint-config-zoo Package
Summary
MAL-2025-192558: Malicious code in eslint-config-zoo (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
eslint-config-zoo is an npm package designed to provide a set of ESLint configurations for JavaScript projects. It helps developers maintain code quality and consistency by enforcing coding standards. However, the package has been compromised, leading to a serious security vulnerability that can fully compromise any system where it is installed.
Vulnerability Detail
The vulnerability stems from the presence of malicious code embedded within the eslint-config-zoo package. This code can grant unauthorized access to the system, allowing attackers to control the machine and potentially exfiltrate sensitive data. The malicious nature of this code has been confirmed by security researchers, and any system running this package should be considered at risk. Users are advised to take immediate action to mitigate the threat.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall eslint-config-zooIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, if you still need ESLint configurations, consider using an alternative package that is known to be secure. You can search for other ESLint configuration packages on npm and choose one that fits your project's needs.
Conclusion
The eslint-config-zoo package has been identified as containing malicious code that poses a significant security risk. Users are strongly advised to uninstall the package immediately and take necessary precautions to secure their systems. Utilizing tools like Vulert can help monitor for such vulnerabilities in the future.
See every vulnerability recorded for eslint-config-zoo →
FAQ
You should immediately uninstall the package using 'npm uninstall eslint-config-zoo' and rotate any sensitive credentials stored on the affected system.
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No, there is currently no patched version available. The only solution is to remove the package entirely.
Failing to address this vulnerability can lead to full system compromise, unauthorized access to sensitive data, and potential data breaches.
Yes, you can use other ESLint configuration packages that are secure and do not contain malicious code.
