guan

GHSA-g97c-cx9q-83hh

Malicious code in guan (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.1.171`

## Source: amazon-inspector (2e04a9a658bc7616e72a5edf276dd049e5b697f2492c46929caf2e01fac95d84)
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.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/guan/MAL-2026-3692.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/guan/MAL-2026-3692.json
- https://pypi.org/project/guan/0.1.100
- https://pypi.org/project/guan/0.1.171
- https://github.com/advisories/GHSA-g97c-cx9q-83hh

Compromised versions (1)

= 0.1.171

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.