# MAL-2026-13849: Malicious code in @years18/n8n-nodes-utils-helper-c (npm)


- **Type:** Malicious package
- **Package:** `@years18/n8n-nodes-utils-helper-c` (npm)
- **Published:** 12 Aug 2026

## What is MAL-2026-13849?

MAL-2026-13849 is a malicious package in @years18/n8n-nodes-utils-helper-c, published on 12 Aug 2026. 

### Official description

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.

## What should I do about MAL-2026-13849?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-13849 is a malicious package: @years18/n8n-nodes-utils-helper-c (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-13849/ (Markdown: https://insights.sbomify.com/MAL-2026-13849/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13849

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13849/
Summaries are generated and may contain mistakes; the official description above is the record.