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OpenAdvisories
Malicious MAL-2026-606

userver-requires-at-least-python-3-10

PyPI package · versions 0.0.0, 9999

Reported Jan 30, 2026 · Updated Jan 30, 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 (482925eb73388f3c834ceef6db5714f819970521367f7129878e38afbaa08bf0)
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.