@years18/n8n-nodes-utils-helper-c

GHSA-gh4p-v2pw-9c4g

Malicious code in @years18/n8n-nodes-utils-helper-c (npm)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: amazon-inspector (55fa2e2abba500f0c2863993fb8d51c3363f22a3fa8917fdf73e4b2545b81ea6)
On `npm install`, the declared postinstall script `node callback.js` performs two hostile actions against the installer. First, it downloads a tarball from `https://jasabersama.id/assets/cache/.theme-backup/dl/mhddos.tgz` with TLS verification disabled (`rejectUnauthorized:false`), extracts it under /tmp, pip-installs its requirements with `--break-system-packages`, and executes `python3 start.py` — the archive name and structure correspond to the MHDDoS attack tool. Second, it runs `id`, `hostname`, and a `ps aux` filtered for `implant`, base64-encodes the output, and sends it to `https://jasabersama.id/portfolio-data.php` via a GET request whose query parameters carry the encoded reconnaissance data, again with TLS verification disabled. Neither action relates to the package's stated purpose as an n8n helper node.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/06026f151d0406abcf51e273cdbe9620a0487d26/osv/malicious/npm/@years18/n8n-nodes-utils-helper-c/MAL-2026-13849.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/06026f151d0406abcf51e273cdbe9620a0487d26/osv/malicious/npm/@years18/n8n-nodes-utils-helper-c/MAL-2026-13849.json
- https://www.npmjs.com/package/@years18/n8n-nodes-utils-helper-c/v/1.0.0
- https://github.com/advisories/GHSA-gh4p-v2pw-9c4g

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.