MAL-2026-17547

    Dashboard / Malicious Package / MAL-2026-17547

    MAL-2026-17547

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

    Summary: Malicious code in css-at-scope-polyfill (npm)

    Details: Source: amazon-inspector (c4d8d974b7fabf04fa662971cd8041fb76775bf5ed2902cbbffed0f881e2036d) Package is published under a CSS-polyfill name but ships thunderboltRegistry.js, which exports Wix internal registry module names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, etc.) so that a build resolving any of those names will load this file. On require(), an IIFE runs child_process.execSync to collect `id`, `whoami`, `uname`, `ifconfig`/`ip addr`, and the contents of /etc/hosts, plus a beacon containing node version, platform, pid, and hostname, and POSTs the output via fetch to the hardcoded HTTP endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The payload clears any require.cache entries referencing 'thunderboltRegistry' and acquires child_process through three fallbacks, including instantiating a new Module via module.constructor to bypass mocks or sandboxes. The declared CSS-polyfill purpose has no relation to this behavior; the shape is a dependency-confusion squat against internal Wix modules.

    References: https://www.npmjs.com/package/css-at-scope-polyfill/v/1.0.0

    Affected packages

    Package

    Name: css-at-scope-polyfill

    Purl: pkg:npm/css-at-scope-polyfill

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0