MAL-2026-16377
Vulnerability from ossf_malicious_packages
-= 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.
- CWE-506 - The product contains code that appears to be malicious in nature.
{
"affected": [
{
"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"
}
}
]
}
},
"package": {
"ecosystem": "PyPI",
"name": "cloushaar-poc-exfil-91827"
},
"versions": [
"0.0.1"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
},
{
"contact": [
"https://github.com/kam193",
"https://bad-packages.kam193.eu/"
],
"name": "Kamil Ma\u0144kowski (kam193)",
"type": "REPORTER"
}
],
"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"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (58b36f7c6e3e2e536f43b51acc410985240e6de6d7bb1e1d78126131e888806f)\nThe package\u0027s 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 \u0026 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",
"id": "MAL-2026-16377",
"modified": "2026-09-22T14:21:19.077183449Z",
"published": "2026-09-22T07:01:53Z",
"references": [
{
"type": "WEB",
"url": "https://bad-packages.kam193.eu/pypi/package/cloushaar-poc-exfil-91827"
},
{
"type": "PACKAGE",
"url": "https://pypi.org/project/cloushaar-poc-exfil-91827/0.0.1/"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in cloushaar-poc-exfil-91827 (PyPI)"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.