MAL-2026-17480

    Dashboard / Malicious Package / MAL-2026-17480

    MAL-2026-17480

    Published: 4 Oct 2026Last Modified: 4 Oct 2026

    Summary: Malicious code in css-interop-observer-polyfill (npm)

    Details: Source: amazon-inspector (089bdc1dd6bdf0216bb911888e81ce97dc171bdef2588fd5de0aadb4a64fbb2b) On module load, thunderboltRegistry.js executes an IIFE that runs id, whoami, uname, ifconfig/ip addr via child_process.execSync and reads /etc/hosts, then sends each result together with hostname, node version, platform and pid to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/[token] via fetch over plain HTTP. The package presents itself as a stub exporting proxies for Wix thunderbolt internal registry names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, etc.), consistent with dependency-confusion targeting of those internal module names while the load-time code performs the host reconnaissance and exfiltration.

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

    Affected packages

    Package

    Name: css-interop-observer-polyfill

    Purl: pkg:npm/css-interop-observer-polyfill

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0