{"id":"MAL-2026-16377","title":"Malicious code in cloushaar-poc-exfil-91827 (PyPI)","summary":"Malicious code in cloushaar-poc-exfil-91827 (PyPI)","severity":"critical","exploited":true,"vendor":"cloushaar-poc-exfil-91827","product":"cloushaar-poc-exfil-91827","ecosystem":"pip","affected":["cloushaar-poc-exfil-91827"],"published":"2026-09-22","updated":"2026-09-22","sourceUpdated":"2026-09-22T14:30:06.900315452Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-16377","references":[{"url":"https://bad-packages.kam193.eu/pypi/package/cloushaar-poc-exfil-91827"},{"url":"https://pypi.org/project/cloushaar-poc-exfil-91827/0.0.1/"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-09-24T07:16:01.856Z","slug":"MAL-2026-16377","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (58b36f7c6e3e2e536f43b51acc410985240e6de6d7bb1e1d78126131e888806f)\nThe 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.\n\n## Source: kam193 (8ec6abf4fcd51274f6bf53cece87bc47051b0751b117e137c68d964b05753e16)\nInstalling the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.\n\n\n---\n\nCategory: 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.\n\n\nCampaign: GENERIC-standard-pypi-install-pentest\n\n\nReasons (based on the campaign):\n\n\n - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.\n\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n\n## Affected packages\n\n- `cloushaar-poc-exfil-91827`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":52.3,"likelihood":0,"exploitation":18,"ransomware":0},"changes":[]}