MAL-2026-17550

    Dashboard / Malicious Package / MAL-2026-17550

    MAL-2026-17550

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

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

    Details: Source: amazon-inspector (1c370cda09695e44d06a44bc14d14817edadc047e4dad0314edcfc752be796e9) The package name mimics a Wix thunderbolt polyfill and ships a registry-manifest.min.json that aliases legitimate @wix thunderbolt registry module names to thunderboltRegistry.js. On require, thunderboltRegistry.js runs an IIFE that uses child_process.execSync to execute shell reconnaissance (id, whoami, uname -a, ifconfig/ip addr, /etc/hosts) and fetches http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f with the command outputs plus hostname, pid, platform, node version, and a site identifier as query parameters, tagged 'rce-poc'. A fallback path constructs a fresh Module instance to re-resolve child_process if the require cache is stubbed, ensuring execution. The destination is plain HTTP to an unrelated external host and is not caller-configurable.

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

    Affected packages

    Package

    Name: css-dwsawd-polyfill

    Purl: pkg:npm/css-dwsawd-polyfill

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0