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OpenAdvisories
Malicious MAL-2026-3237

protocol-stub-generator

PyPI package · versions 999.0.0, 999.0.1

Reported May 2, 2026 · Updated May 2, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: kam193 (8ad6f31dc6bdf35ca55cf2a55e9124e07131de068c8ff945e62716637b6e06d1)
Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

- The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

- The package overrides the install command in setup.py to execute malicious code during installation.