# MAL-2026-13904: Malicious code in @years19/n8n-nodes-utils-helper-u (npm)


- **Type:** Malicious package
- **Package:** `@years19/n8n-nodes-utils-helper-u` (npm)
- **Published:** 12 Aug 2026

## What is MAL-2026-13904?

MAL-2026-13904 is a malicious package in @years19/n8n-nodes-utils-helper-u, published on 12 Aug 2026. 

### Official description

The package's postinstall hook (callback.js) and its declared main entry (index.js, byte-identical to callback.js) both write a Python script to /tmp/attack.py and spawn it via `nohup python3 /tmp/attack.py... &`. The script launches hundreds of UDP/TCP flood threads against the hardcoded target 103.118.252.21 for 600 seconds, turning the installer's host into a DDoS source against a third party. After launching the flood, the code collects host identifiers (`id`, `hostname`, running process count, /proc/loadavg), base64-encodes them, and issues an HTTPS GET to jasabersama.id/portfolio-data.php with query parameters `k=S7k9xQ2mZj&c=<base64>`, with TLS certificate verification disabled (`rejectUnauthorized: false`). Because index.js is the module's main entry, the same dropper also fires whenever the package is `require`d — for example when loaded as an n8n community node — in addition to firing on `npm install` via the postinstall lifecycle hook.

## What should I do about MAL-2026-13904?

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-2026-13904 is a malicious package: @years19/n8n-nodes-utils-helper-u (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-2026-13904/ (Markdown: https://insights.sbomify.com/MAL-2026-13904/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13904

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13904/
Summaries are generated and may contain mistakes; the official description above is the record.