n8n-nodes-moonlet-utils

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: amazon-inspector (f49ee5bcbcb7e8f1028de4021134fdbbc895e737700cf82a834fb26d3b23dd05)
postinstall.js fetches an opaque binary from https://mkicom.com/.well-known/pki-validation/ct_dn8, writes it to /tmp/.nc, chmods it 0755, and launches it detached via `spawn('/bin/sh', ['-c', 'setsid ' + OUT + '... &'], {detached:true})`. The download URL is disguised under a `.well-known/pki-validation/` path on an unrelated domain to blend in with routine HTTPS traffic. index.js is an empty stub (`module.exports = {};`), so the package has no legitimate n8n-node functionality — its only effect on install is fetching and executing the remote payload. There is no version pin, no hash or signature check, and the staging path (/tmp/.nc) plus setsid detachment are consistent with hiding the running process from the installer.

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/c93fda3f08313c598165839b4fb8b4d4d912f27a/osv/malicious/npm/n8n-nodes-moonlet-utils/MAL-2026-17177.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/c93fda3f08313c598165839b4fb8b4d4d912f27a/osv/malicious/npm/n8n-nodes-moonlet-utils/MAL-2026-17177.json
- https://www.npmjs.com/package/n8n-nodes-moonlet-utils/v/1.0.0
- https://github.com/advisories/GHSA-f77h-w3rc-2c74

Compromised versions (1)

• = 1.0.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.