pyuserfox

GHSA-j4qg-f3r8-33f3

Malicious code in pyuserfox (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.2`

## Source: kam193 (23edaa0c720d313b1598b1391f83081eab817e337c65033b28755ad7f46af0dd)
During import, package silently download and executes remote code. There is no other action. During analysis, the remote code was no longer accessible. The campaign was originally discovered by Threx-code.


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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.


Campaign: 2026-11-old-pyuserfox


Reasons (based on the campaign):


 - Downloads and executes a remote malicious script.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/5eca7ee1aaa06c0fe6d45abdfe523b1fadfaa38d/osv/malicious/pypi/pyuserfox/MAL-2026-18754.json))

**References:**
- https://github.com/ossf/malicious-packages/pull/1749
- https://bad-packages.kam193.eu/pypi/package/pyuserfox
- https://github.com/ossf/malicious-packages/blob/5eca7ee1aaa06c0fe6d45abdfe523b1fadfaa38d/osv/malicious/pypi/pyuserfox/MAL-2026-18754.json
- https://github.com/advisories/GHSA-j4qg-f3r8-33f3

Compromised versions (1)

= 0.0.2

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