# MAL-2026-17552: Malicious code in css-hgwctv-polyfill (npm)


- **Type:** Malicious package
- **Package:** `css-hgwctv-polyfill` (npm)
- **Published:** 5 Oct 2026

## What is MAL-2026-17552?

MAL-2026-17552 is a malicious package in css-hgwctv-polyfill, published on 5 Oct 2026. 

### Official description

On require, thunderboltRegistry.js runs an immediately-invoked function that uses child_process.execSync to collect host identity and network reconnaissance from the installer's machine (`id`, `whoami`, `uname -a`, `ifconfig`/`ip addr`, and `/etc/hosts`), plus hostname, Node.js version, platform and pid, and transmits each result via fetch to the hardcoded plain-HTTP endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The package also exports Proxy stubs named thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry and ships a registry-manifest.min.json referencing parastorage.com, mimicking internal Wix thunderbolt build modules so the module auto-loads inside a Wix build and executes the reconnaissance payload. A CSS polyfill has no functional reason to execute shell commands, read /etc/hosts, or contact an external host.

## What should I do about MAL-2026-17552?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-17552 is a malicious package: css-hgwctv-polyfill (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-17552/ (Markdown: https://insights.sbomify.com/MAL-2026-17552/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17552

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17552/
Summaries are generated and may contain mistakes; the official description above is the record.