---
id: "MAL-2026-16377"
kind: "package"
aliases: ["MAL-2026-16377"]
title: "Malicious code in cloushaar-poc-exfil-91827 (PyPI)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "cloushaar-poc-exfil-91827", "fixed": [], "affected": "= 0.0.1", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-09-22T07:01:53+00:00"
first_seen_at: "2026-10-26T20:51:57+00:00"
updated_at: "2026-10-26T21:10:31+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-16377", "first_seen_at": "2026-10-26T20:51:57+00:00"}]
---

# Malicious code in cloushaar-poc-exfil-91827 (PyPI)

## Affected

- pypi:cloushaar-poc-exfil-91827 affected = 0.0.1 fixed ?

## Timeline

- 2026-10-26T20:51:57+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-16377

## From the sources

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

## Source: amazon-inspector (58b36f7c6e3e2e536f43b51acc410985240e6de6d7bb1e1d78126131e888806f)
The package's setup.py, executed automatically during pip install, iterates a hardcoded list of installer-side filesystem paths (/flag, /flag.txt, /app/flag, /root/flag, and similar candidates), reads their contents, and transmits them via urllib.request.urlopen as a query-string parameter to the hardcoded endpoint https://webhook.site/f41d2013-dd84-4139-85f8-8e989e0761b8. The webhook.site host is an anonymous request-collector controlled by whoever provisioned that endpoint. The name and version suggest a proof-of-concept exfiltration package, but the shipped code performs real install-time filesystem reads and outbound HTTP exfiltration against any host that runs pip install on this artifact.

## Source: kam193 (8ec6abf4fcd51274f6bf53cece87bc47051b0751b117e137c68d964b05753e16)
Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.


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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.

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