MAL-2026-13619 Malicious code in atlas-internal (PyPI)
- Package
- atlas-internal
- Registry
- PyPI
What is MAL-2026-13619?
MAL-2026-13619 is a malicious package in atlas-internal, published on 7 Aug 2026.
Official description
setup.py overrides the egg_info command to execute automatically during pip install. The overridden command collects the installer's hostname, current working directory, and OS username, URL-encodes them, and sends them via an HTTP GET request to a hardcoded Interactsh out-of-band callback subdomain at fpvbsifkklbmklusmxby2405wa7x7x5bf.oast.fun. This fires on default install without user interaction and leaks installer host identifiers to an attacker-controlled OOB server, consistent with a dependency-confusion reconnaissance beacon.
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.
What should I do about MAL-2026-13619?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.