Malicious code in css-svqggc-polyfill (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (6b23cf39720388bcf9f26621bd52e256e18a011bf3b6821b7d9f5f60115b9663) Package masquerades as a CSS polyfill while impersonating internal Wix Thunderbolt registry modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, and other namespace stubs), with a shipped registry-manifest pointing those names at parastorage.com URLs under this package's own name — a dependency-confusion shape. thunderboltRegistry.js runs an IIFE on require that purges its own entries from require.cache so each require re-runs the payload, obtains child_process via multiple fallbacks (including constructing a fresh Module instance to bypass sandboxed require stubs), and executes reconnaissance commands (id, whoami, uname -a, ifconfig/ip addr, /etc/hosts) via execSync. The command output plus host beacon fields (node version, platform, pid, hostname, site) are sent over cleartext HTTP via fetch GET to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The Proxy-based stub exports ensure the import appears to succeed silently after exfiltration.
MAL-2026-17557
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:MAL-2026-17557
css-svqggc-polyfill
Source reference: /affected/0/package/name
- Affected versions
- 1.0.0
Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"package": {
"name": "css-svqggc-polyfill",
"purl": "pkg:npm/css-svqggc-polyfill",
"ecosystem": "npm"
},
"versions": [
"1.0.0"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
}
],
"source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-svqggc-polyfill/MAL-2026-17557.json",
"indicators": {
"evidence_files": [
{
"path": "thunderboltRegistry.js",
"tlsh": "e87154a5b99df02065c33438cb7f4049b4bbc6672d6caee0744899b01f7985c01be6f8",
"sha256": "a485cb48081ea590cab385a405886cfe6f30af7d415f30bc8d7937ace461b928"
},
{
"path": "registry-manifest.min.json",
"tlsh": "2301a5dd0c0a41fa1bc05acf4402fa0af7038dc60cedd672952141a078245f102febbb",
"sha256": "5d173e4ca9713636b5060832d6c8b8299136ad3115b7affcd0b7b88ddefec879"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "87eb3d48163b2973abfc3731895cef65d40cdeb4",
"sha512_sri": "sha512-zGStGUofphvCP3Ki3dp//PLu48U+P2QokbHMXFf5GGiNKvVAmnGYTDOxOvFKpTSs4j3mKrsz5avoHdRW37UZzw=="
},
"filename": "css-svqggc-polyfill-1.0.0.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #83619 · Revision 1
- Added to Heist Feed
- Publisher date