Malicious code in css-hgwctv-polyfill (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (ee1103a16c6f933686f07e8ce94068057f49e5cf2f0a6a9ccf01f2baeb7cfe95) 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.

Source published

5 Oct 2026 03:36:55 UTC

Source modified

5 Oct 2026 04:15:05 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.