MAL-2026-902

    Dashboard / Malicious Package / MAL-2026-902

    MAL-2026-902

    Published: 14 Feb 2026Last Modified: 14 Feb 2026

    Summary: Malicious code in crc32fast (PyPI)

    Details: Source: kam193 (3b89c674974bf58c7388a27bf1c6ea954a890de45a3e9ba4830c1eada3a3ea6a) 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. Source: ossf-package-analysis (01c9a259f7b88e992aee84db09b728b15f74a517857ab5b3aaa16f725a9debbd) The OpenSSF Package Analysis project identified 'crc32fast' @ 1.0.99 (pypi) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity. - The package executes one or more commands associated with malicious behavior.

    References: https://bad-packages.kam193.eu/pypi/package/crc32fast

    Affected packages

    Package

    Name: crc32fast

    Purl: pkg:pypi/crc32fast

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.99