# MAL-2026-13889: Malicious code in @years19/n8n-nodes-utils-helper-f (npm)


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

## What is MAL-2026-13889?

MAL-2026-13889 is a malicious package in @years19/n8n-nodes-utils-helper-f, published on 12 Aug 2026. 

### Official description

The package's postinstall (scripts.postinstall: node callback.js) collects host identity and environment fingerprint (output of `id`, hostname, Python user-site path with its contents filtered for offensive-tooling keywords such as pyroxy/impacket/multidict/socks/maxmind, presence of /tmp/mhddos and /tmp/implant, uptime), base64-encodes the result, and sends it as a query string to https://jasabersama.id/portfolio-data.php with TLS verification disabled (rejectUnauthorized: false). The request path also includes a hardcoded key `k=S7k9xQ2mZj` and a `c=` parameter carrying `echo <b64> | base64 -d >> /tmp/n8n_rce_result.txt`, matching a beacon/check-in shape for an attacker-controlled command channel. The package poses as an n8n community node (nodes/PwnNode.node.js exports only a stub description) while `main` (index.js) is identical to the postinstall exfil script, so both `npm install` and any `require` of the package trigger the beacon. The name mimics legitimate `n8n-nodes-*` community naming.

## What should I do about MAL-2026-13889?

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-2026-13889 is a malicious package: @years19/n8n-nodes-utils-helper-f (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-2026-13889/ (Markdown: https://insights.sbomify.com/MAL-2026-13889/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13889

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13889/
Summaries are generated and may contain mistakes; the official description above is the record.