MAL-2026-15931Critical▾ Abyssal⚠ Exploited in the wildMalicious code in metricboxlite (PyPI)
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 52.3 · likelihood 0 · exploitation 18
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
critical → none
none → critical
critical → none
none → critical
critical → none
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MetricBoxLite 1.0 collects the installer's username (getpass.getuser) and hostname (socket.gethostname), JSON-encodes them, and POSTs the payload to a hardcoded remote endpoint at https://kznkrxfzy4xgib6ejfh8etegndp3kwguf.oast.invalid/collect. The beacon fires from two independent paths: setup.py calls the reporter at module top level, so it runs during pip install of the sdist, and metricboxlite/init.py performs the same collect-and-POST at top level, so any import metricboxlite also phones home. Network errors are silently swallowed. The destination is an OAST/out-of-band-callback host that is not first-party to the package or its ecosystem, and the collected fields are installer identity rather than package operational data.
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.
metricboxliteRefer to the advisory for the patched release.
Field changes observed since this record was first indexed.