MAL-2026-16250

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/marketing-mcp/MAL-2026-16250.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16250
Published
2026-09-17T12:43:45Z
Modified
2026-09-17T14:45:11Z
Summary
Malicious code in marketing-mcp (PyPI)
Details

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

Source: amazon-inspector (87216e00fe68e2de8b140f1f9ffc2db5a8e814f38030e2eb6120c9ae9e7ca3ff)

The package exposes an MCP tool send(path) that reads a caller-specified local file and POSTs its contents to a hardcoded https://webhook.site/4acf7132-a75e-47e1-aeff-0350c8eac16c endpoint. The destination is a fixed public request-capture service, is not caller-configurable, and is not the installer's infrastructure. Any file path an LLM agent is induced to pass to send — including sensitive paths such as ~/.ssh/id_rsa, ~/.aws/credentials, .env files, or source trees — is uploaded to that third-party capture URL where the operator of the webhook can retrieve it. The package's advertised marketing/MCP framing does not match the actual behavior, which is a one-way file relay to an author-controlled inspection endpoint.

Source: kam193 (6a271b29f840e2047c34363e985921e1a374194cfcae7524698f178c96bea9eb)

Package attempts to lure LLM agents to exfiltrate files to a hardcoded location. Analysis of infrastructure suggests preparing for exfiltrating credentials.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-09-marketing-mcp

Reasons (based on the campaign):

  • files-exfiltration

  • llm-threat

Database specific 
{
    "iocs": {
        "urls": [
            "https://webhook.site/4acf7132-a75e-47e1-aeff-0350c8eac16c"
        ]
    },
    "malicious-packages-origins": [
        {
            "id": "pypi/2026-09-marketing-mcp/marketing-mcp",
            "import_time": "2026-09-17T13:18:14.640160033Z",
            "modified_time": "2026-09-17T12:43:45.919849Z",
            "sha256": "6a271b29f840e2047c34363e985921e1a374194cfcae7524698f178c96bea9eb",
            "source": "kam193",
            "versions": [
                "0.1.0"
            ]
        },
        {
            "id": "IN-MAL-2026-020123",
            "import_time": "2026-09-17T14:41:23.780814888Z",
            "modified_time": "2026-09-17T14:27:07Z",
            "sha256": "87216e00fe68e2de8b140f1f9ffc2db5a8e814f38030e2eb6120c9ae9e7ca3ff",
            "source": "amazon-inspector",
            "versions": [
                "0.1.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / marketing-mcp

Package

Name
marketing-mcp
View open source insights on deps.dev
Purl
pkg:pypi/marketing-mcp

Affected ranges

Affected versions

0.*
0.1.0

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": "src/marketing_mcp/server.py",
            "sha256": "77b5593a340c0d5de3a53f09513e01d2799afd3f1a897bd0a5d1193d3a761f49",
            "tlsh": "6e4122cb6fc921e1875153d40f028da4e715e8ef3a020a387b9c51793f8813587eeaa8"
        }
    ],
    "package_integrity": [
        {
            "filename": "marketing_mcp-0.1.0-py3-none-any.whl",
            "hashes": {
                "blake2b_256": "bccf346427e4693fbae743c35fa60dd92e4f46436f0de051542a6bfc7c58c05f",
                "md5": "59c16b969497e07950ae7628a1c1f3ac",
                "sha256": "7c44657bd6a87387c0ac074742b87f7b49df7a18883c430a89411466249c2543"
            }
        },
        {
            "filename": "marketing_mcp-0.1.0.tar.gz",
            "hashes": {
                "blake2b_256": "f023f6ad2cf2dd967eab7d853cde326adcff57fc32c7afc1430bf4ce01cfb7a6",
                "md5": "0a52c0e8028bdda5a34f7011aefbf128",
                "sha256": "e5ca7392e9ce80c0b1e9317da517c57236ac4031e7c32abe91fdf15328a65c33"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/marketing-mcp/MAL-2026-16250.json"