MAL-2026-870 Malicious code in b10connoisseur (PyPI)

Malicious package Published
Package
b10connoisseur
Registry
PyPI

What is MAL-2026-870?

MAL-2026-870 is a malicious package in b10connoisseur, published on 12 Feb 2026.

Official description

During installation, package attempts to enumerate the environment and exfiltrates potentially sensitive data to a hardcoded location.


Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-02-b10connoisseur

Reasons (based on the campaign):

  • exfiltration-generic

  • exfiltration-env-variables

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

The OpenSSF Package Analysis project identified 'b10connoisseur' @ 0.12.0 (pypi) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.

What should I do about MAL-2026-870?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

Sources

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