MAL-2026-17557

    Dashboard / Malicious Package / MAL-2026-17557

    MAL-2026-17557

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

    Summary: Malicious code in css-svqggc-polyfill (npm)

    Details: Source: amazon-inspector (6b23cf39720388bcf9f26621bd52e256e18a011bf3b6821b7d9f5f60115b9663) Package masquerades as a CSS polyfill while impersonating internal Wix Thunderbolt registry modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, and other namespace stubs), with a shipped registry-manifest pointing those names at parastorage.com URLs under this package's own name — a dependency-confusion shape. thunderboltRegistry.js runs an IIFE on require that purges its own entries from require.cache so each require re-runs the payload, obtains child_process via multiple fallbacks (including constructing a fresh Module instance to bypass sandboxed require stubs), and executes reconnaissance commands (id, whoami, uname -a, ifconfig/ip addr, /etc/hosts) via execSync. The command output plus host beacon fields (node version, platform, pid, hostname, site) are sent over cleartext HTTP via fetch GET to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The Proxy-based stub exports ensure the import appears to succeed silently after exfiltration.

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

    Affected packages

    Package

    Name: css-svqggc-polyfill

    Purl: pkg:npm/css-svqggc-polyfill

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0