Launch Week Day 1: Announcing Security Design Review
CRITICAL PyPI Malware

Malicious code in merino-common (PyPI)

MAL-2026-5817

Published ยท Modified

Description


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Source: kam193 (61117d9c074586912421f9fe2104b792a0eb2a359dd1c6e9c8548bc2aa299dd0)

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.


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.

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