# MAL-2026-3692: Malicious code in guan (PyPI)


- **Type:** Malicious package
- **Package:** `guan` (PyPI)
- **Published:** 12 May 2026

## What is MAL-2026-3692?

MAL-2026-3692 is a malicious package in guan, published on 12 May 2026. 

### Official description

The top-level `src/guan/__init__.py` unconditionally calls `statistics_of_guan_package()` on every `import guan`. That function (in `src/guan/others.py`) opens a raw TCP socket to the hardcoded author-controlled endpoint `socket.guanjihuan.com:12345` and sends a JSON payload containing the installer's MAC address (via `uuid.getnode()`), the `guan` package version, and timestamp. There is no opt-out, no documentation of this behavior in README/PKG-INFO, and no user consent. This constitutes silent collection of a stable hardware identifier from every machine that imports the package and transmits it to an author-controlled server — an installer-side data exfiltration pattern, not merely author-side self-harm. While the payload is narrow (MAC + version + time), MAC addresses are persistent hardware identifiers suitable for tracking, correlation, and deanonymization of developer/build machines.

## What should I do about MAL-2026-3692?

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-2026-3692 is a malicious package: guan (PyPI). 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-2026-3692/ (Markdown: https://insights.sbomify.com/MAL-2026-3692/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-3692

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-3692/
Summaries are generated and may contain mistakes; the official description above is the record.