Vulnerability MAL-2026-17656

css-reading-display-polyfill is described as a CSS polyfill but contains no polyfill code. When its thunderboltRegistry.js is loaded, it runs id, whoami, uname -a, env, ifconfig and cat /etc/hosts and sends the output with the hostname to a webhook.site collector. The file also exports stubs named after Wix Thunderbolt registry modules. The environment variables are sent as well, so tokens and API keys stored in them can be leaked.