Malicious code in css-ikomdq-polyfill (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (255cceca3ca8631c9b225745c5b64a71fd6c09b60fa3ad95b419fccb66f035f2) The package presents itself as a CSS polyfill but ships thunderboltRegistry.js, which on require() executes a top-level IIFE that runs id, whoami, uname -a, ifconfig/ip addr, and reads /etc/hosts via child_process.execSync, then posts the command outputs together with hostname, node version, platform, and pid to the hardcoded plain-HTTP endpoint http://dxpoc.gt.tc/callback.php/ using fetch. The module also deletes its own entries from require.cache so the payload re-runs on each require() rather than being memoized. The package name and the thunderbolt/editor/corvid Proxy facade impersonate Wix parastorage registry modules to encourage accidental installation.
MAL-2026-17553
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-2026-17553
css-ikomdq-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-ikomdq-polyfill",
"purl": "pkg:npm/css-ikomdq-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-ikomdq-polyfill/MAL-2026-17553.json",
"indicators": {
"evidence_files": [
{
"path": "thunderboltRegistry.js",
"tlsh": "e87154a5b99df02065c33438cb7f4049b4bbc6672d6caee0744899b01f7985c01be6f8",
"sha256": "a485cb48081ea590cab385a405886cfe6f30af7d415f30bc8d7937ace461b928"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "b83a62107dde2ec224c350e1e870a46461948d87",
"sha512_sri": "sha512-jRUk8onAmbjznZi/Iq1AFTAd+snjNFq2dqcY7elLWRhEwVFqdaG+pEeN84bKV9r+UF3jbWNOqI1m1VtVO47eHQ=="
},
"filename": "css-ikomdq-polyfill-1.0.0.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #83611 · Revision 1
- Added to Heist Feed
- Publisher date