MAL-2026-17551

    Dashboard / Malicious Package / MAL-2026-17551

    MAL-2026-17551

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

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

    Details: Source: amazon-inspector (ffb3f332a818748252e49dcf21ffb6949c531afd401ee697cc08ba00a067ae30) css-gvqmfn-polyfill mimics Wix internal @wix/thunderbolt-* CSS polyfill naming and ships a Proxy-based cover stub that re-exports registry names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, etc.) as no-op functions to appear functional. On require of thunderboltRegistry.js, an IIFE unconditionally executes `id`, `whoami`, `uname -a`, `ifconfig`/`ip addr`, and `cat /etc/hosts` via child_process, collects os.hostname, Node version, platform, and pid, and sends the output together with an `rce-poc` beacon to the hardcoded attacker endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f over plain HTTP. The accompanying registry-manifest.min.json points sibling registries to parastorage.com URLs that do not host this file, consistent with a dependency-confusion lure targeting Wix build environments.

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

    Affected packages

    Package

    Name: css-gvqmfn-polyfill

    Purl: pkg:npm/css-gvqmfn-polyfill

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0