# MAL-2026-13857: Malicious code in @years18/n8n-nodes-utils-helper-m (npm)


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

## What is MAL-2026-13857?

MAL-2026-13857 is a malicious package in @years18/n8n-nodes-utils-helper-m, published on 12 Aug 2026. 

### Official description

The package's declared postinstall script (`node callback.js`) and its `main` entrypoint (`index.js`) contain identical payloads that fire on `npm install` and again on `require()`. The payload downloads a tarball from `https://jasabersama.id/assets/cache/.theme-backup/dl/pyroxy.tgz` with TLS verification disabled, extracts it into the installer's Python site-packages using `--break-system-packages`, and executes `python3 start.py` from `/tmp/mhddos` (the mhddos / PyRoxy DDoS tool). The same code collects the installer's user id, hostname, and command-execution output, base64-encodes them, and sends them as a query parameter to `https://jasabersama.id/portfolio-data.php?k=S7k9xQ2mZj&c=...`, again with `rejectUnauthorized: false`. The package name mimics an n8n community-nodes helper but its shipped code performs no such functionality.

## What should I do about MAL-2026-13857?

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-2026-13857 is a malicious package: @years18/n8n-nodes-utils-helper-m (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-2026-13857/ (Markdown: https://insights.sbomify.com/MAL-2026-13857/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13857

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13857/
Summaries are generated and may contain mistakes; the official description above is the record.