MAL-2026-864

    Dashboard / Malicious Package / MAL-2026-864

    MAL-2026-864

    Published: 12 Feb 2026Last Modified: 19 Feb 2026

    Summary: Malicious code in marshmellow (PyPI)

    Details: Source: kam193 (dbf6f50353e6489a831a2575831b93fd5f99a9cbd60cc30260fd13838beda73f) Package is a typosquatting or dependency confusion attempt with a low-harm local-only action, like leaving a flag file. 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-local-typosquatting Reasons (based on the campaign): - dependency-confusion - The package overrides the install command in setup.py to execute malicious code during installation. - typosquatting Source: ossf-package-analysis (385a79bb53771282b64601f5a3b17f0d7a3d735efbf863584f0dd2755bc2bf08) The OpenSSF Package Analysis project identified 'marshmellow' @ 1.1.0 (pypi) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.

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

    Affected packages

    Package

    Name: marshmellow

    Purl: pkg:pypi/marshmellow

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0
    MAL-2026-864 | CVE-DB