Malicious Code Vulnerability in wix-ssr-thunderbolt-grid-polyfill Package
Summary
MAL-2026-17664: Malicious code in wix-ssr-thunderbolt-grid-polyfill (npm). Affects wix-ssr-thunderbolt-grid-polyfill versions 0.1.0. No fix is published. How to fix ↓
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Background
The wix-ssr-thunderbolt-grid-polyfill package is an npm library intended for use within the Wix Thunderbolt framework. It is designed to provide polyfill functionalities for server-side rendering (SSR) environments. However, this package has been found to contain malicious code that performs reconnaissance on the host environment, compromising security and privacy.
Vulnerability Detail
The vulnerability originates from the inclusion of two minified bundles, poc-model.bundle.min.js and poc-bootstrap.bundle.min.js, which are designed to collect sensitive information from the SSR environment. This includes data such as Node version, current working directory, hostname, IP address, user ID, network interfaces, and more. The collected data is then sent to an attacker-controlled webhook, posing a significant risk to the security of the affected systems. The malicious nature of this code is underscored by its lack of legitimate functionality within the Wix SSR framework.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall wix-ssr-thunderbolt-grid-polyfillIf 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 malicious code by removing the package from your project entirely. This can be done with the command: npm uninstall wix-ssr-thunderbolt-grid-polyfill. Additionally, consider using alternative packages that provide similar functionalities without the associated risks.
Conclusion
The wix-ssr-thunderbolt-grid-polyfill package contains malicious code that poses a significant security risk. Immediate action is required to remove the package and protect your environment. Regular monitoring and updates are essential to maintain security in your software projects.
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FAQ
It is an npm package intended for use within the Wix Thunderbolt framework, designed to provide polyfill functionalities for server-side rendering.
The malicious code collects sensitive information from the host environment and sends it to an attacker-controlled webhook.
You should uninstall the package immediately and monitor for any updates or patches that may address the vulnerability.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application using the Vulert playground at Vulert Scanner.
Regularly audit your dependencies, use tools like Vulert for real-time monitoring, and stay informed about vulnerabilities in the packages you use.
References
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