MAL-2026-16377

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/cloushaar-poc-exfil-91827/MAL-2026-16377.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16377
Published
2026-09-22T07:01:53Z
Modified
2026-09-22T14:30:06Z
Summary
Malicious code in cloushaar-poc-exfil-91827 (PyPI)
Details

-= 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.

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.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "pypi/GENERIC-standard-pypi-install-pentest/cloushaar-poc-exfil-91827",
            "import_time":  "2026-09-22T07:22:17.293695322Z",
            "modified_time":  "2026-09-22T07:01:53.113128Z",
            "sha256":  "8ec6abf4fcd51274f6bf53cece87bc47051b0751b117e137c68d964b05753e16",
            "source":  "kam193",
            "versions":  [
                "0.0.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-020283",
            "import_time":  "2026-09-22T14:19:07.588964893Z",
            "modified_time":  "2026-09-22T13:56:02Z",
            "sha256":  "58b36f7c6e3e2e536f43b51acc410985240e6de6d7bb1e1d78126131e888806f",
            "source":  "amazon-inspector",
            "versions":  [
                "0.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / cloushaar-poc-exfil-91827

Package

Name
cloushaar-poc-exfil-91827
View open source insights on deps.dev
Purl
pkg:pypi/cloushaar-poc-exfil-91827

Affected ranges

Affected versions

0.*
0.0.1

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "setup.py",
            "sha256":  "3947cf7c2e20212f03cf711c456cad30ff6fe82736ad11db52c28529c9245407",
            "tlsh":  "70f0a2536e263109a1e1d45d4930e976e3239313c30395a3b6cc67b61f5d87cdc42d05"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "cloushaar_poc_exfil_91827-0.0.1-py3-none-any.whl",
            "hashes":  {
                "blake2b_256":  "14aa5e697fa97107593f6b1abe15b5786846a50ed19789f3344d3475678a05fa",
                "md5":  "315b4d7468adb0fea9e6586654bf24df",
                "sha256":  "0d1859e7398157044692f3a3a2733b6900507fa5d9e29c5e73cfdf7c4b1948b3"
            }
        },
        {
            "filename":  "cloushaar_poc_exfil_91827-0.0.1.tar.gz",
            "hashes":  {
                "blake2b_256":  "2f74871886a653f17898f03a577ccd382b611fa2c307a89ce2d175c109ba5ae6",
                "md5":  "24838c30aafaac207673389fb548af9c",
                "sha256":  "94287a48c32bef27ba25edbac874aebde2492d6a1709e402ef99dee525a64cd8"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/cloushaar-poc-exfil-91827/MAL-2026-16377.json"