---
id: MAL-2026-15931
title: Malicious code in metricboxlite (PyPI)
summary: Malicious code in metricboxlite (PyPI)
severity: critical
exploited: true
vendor: metricboxlite
product: metricboxlite
ecosystem: pip
affected:
  - metricboxlite
published: '2026-09-04'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T05:30:05.127630169Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/MAL-2026-15931'
references:
  - url: 'https://bad-packages.kam193.eu/pypi/package/metricboxlite'
  - url: 'https://pypi.org/project/MetricBoxLite/2.0/'
  - url: 'https://pypi.org/project/MetricBoxLite/1.0/'
tags:
  - osv
  - pip
  - malware
ingestedAt: '2026-09-04T19:32:58.678Z'
---

## Overview


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_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (d5a511a75c8c42dcd677dd3814265d3befefa7f339bdc6b0336788635813e837)
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.

## Source: kam193 (83407b9909ebc137e4d47fbb7fe2672a5920dd22bfd7d86ce8edb536bdd5fcab)
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.


## Affected packages

- `metricboxlite`

## Remediation

Refer to the advisory for the patched release.