Malicious code in n8n-nodes-moonlet-helpers (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (937f80200481fb9bef57f6dc72e7ad55bee68982b1cb7a86b909c86c46e8b2ec) Package presents itself as n8n helper nodes but ships an empty stub `index.js` (`module.exports = {}`) and no functional node modules. On `npm install`, `postinstall.js` runs automatically: it performs an HTTPS GET to `https://mkicom.com/.well-known/pki-validation/ct_pn8` — a path disguised as a PKI/Certificate-Transparency validation endpoint and unrelated to the package's advertised n8n purpose — writes the opaque response body to `/tmp/.np`, chmods it 0755, and executes it via `spawn('/bin/sh', ['-c', 'setsid /tmp/.np... &'], {detached: true})` so the process survives npm exit. There is no hash, signature, or version pinning on the downloaded bytes. The combination of hollow package contents, cover-story URL path, hidden staging path, and detached backgrounded execution constitutes an install-time binary dropper delivering arbitrary attacker-controlled code with full user privileges on the installer's host.
MAL-2026-17176
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-2026-17176
n8n-nodes-moonlet-helpers
Source reference: /affected/0/package/name
- Affected versions
- 1.0.0
Source reference:
/affected/0/versions1.0.4Source 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": "n8n-nodes-moonlet-helpers",
"purl": "pkg:npm/n8n-nodes-moonlet-helpers",
"ecosystem": "npm"
},
"versions": [
"1.0.0",
"1.0.4"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"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/n8n-nodes-moonlet-helpers/MAL-2026-17176.json",
"indicators": {
"evidence_files": [
{
"path": "postinstall.js",
"tlsh": "c10120e751f180106b3240dce063b53fa507f00166429de0f85c85234fc16bd493b5f8",
"sha256": "57ca4cffba58dc9cb3dbf77dfbd201fd9183cfb5cfb738c4f61ab74b2829eb4a"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "a021317979bd87040aaa6a70b65255de3a9bbf0c",
"sha512_sri": "sha512-X7dccg2qEkYT5YeFcaYxLL9gNiaeh7lFwJYhm3YXSBWWxNX0f9Oy9fLk9bOLrCcyQmUnFxW5ZfP9rYQgfDTzVA=="
},
"filename": "n8n-nodes-moonlet-helpers-1.0.0.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #14779 · Revision 1
- Added to Heist Feed
- Publisher date