MAL-2026-15929

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pymaas/MAL-2026-15929.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15929
Published
2026-09-04T15:01:36Z
Modified
2026-09-04T21:30:08.747828345Z
Summary
Malicious code in pymaas (PyPI)
Details

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

Source: amazon-inspector (3d07b21485fb1007b5cca6c07b48620d235200b19dd62e8d6018d019ec5557dc)

On import pymaas, top-level code in the package invokes a _canary() function that collects the entire os.environ dictionary and socket.gethostname(), serializes them as JSON, and POSTs the payload via urllib.request.urlopen to the hardcoded host https://vuorblucjega.dssldrf.net/python-install-log/pymaas. The behavior runs unconditionally on import with no consent, no gating, and no relationship to the destination domain. Combined with the implausibly high version 99.99.0 and the package's own dependency confusion test description, the shipped code is a dependency-confusion beacon that harvests any credentials present in the process environment (CI tokens, cloud provider keys, registry auth tokens, database passwords) and delivers them to an external non-publisher host.

Source: kam193 (81e7303aa1cc62cb0fd1e4e6bc28ce118568e8eb5fb56d2a44818bacedf5ebdb)

During import, the package exfiltrates environment variables.

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

Campaign: 2026-09-amirgo4496

Reasons (based on the campaign):

  • exfiltration-env-variables

  • dependency-confusion

  • The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "81e7303aa1cc62cb0fd1e4e6bc28ce118568e8eb5fb56d2a44818bacedf5ebdb",
            "id": "pypi/2026-09-amirgo4496/pymaas",
            "modified_time": "2026-09-04T15:01:36.040381Z",
            "import_time": "2026-09-04T15:39:11.26492664Z",
            "source": "kam193",
            "versions": [
                "99.99.0"
            ]
        },
        {
            "sha256": "3d07b21485fb1007b5cca6c07b48620d235200b19dd62e8d6018d019ec5557dc",
            "id": "IN-MAL-2026-019642",
            "modified_time": "2026-09-04T21:03:35Z",
            "source": "amazon-inspector",
            "import_time": "2026-09-04T21:15:20.848117517Z",
            "versions": [
                "99.99.0"
            ]
        }
    ],
    "iocs": {
        "domains": [
            "vuorblucjega.dssldrf.net"
        ]
    }
}
References
Credits

Affected packages

PyPI / pymaas

Package

Name
pymaas
View open source insights on deps.dev
Purl
pkg:pypi/pymaas

Affected ranges

Affected versions

99.*
99.99.0

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "1894a55a3f8fe1b356ff641eda725a7bcbbdb41049a2a059c7b51dadafba7cd5",
            "path": "src/pymaas/__init__.py",
            "tlsh": "bbf0c0d2e1207553b587b1008c699aa432557d0f7e126cb1f88d17984fcd83e90b25ec"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha256": "cd5c4f8341e4ad35bbc88ca87ac3752d94cc5e154c07bd2bba8eca751c5ea4e7",
                "md5": "4d2b128923db871badebbc64ec1e564c",
                "blake2b_256": "36d37b12d33301f67459052831c71dd49abbdc5a3b89a924772285ed7d04d16d"
            },
            "filename": "pymaas-99.99.0-py3-none-any.whl"
        },
        {
            "hashes": {
                "sha256": "e836de22a1550a1b6963780b66233afa552aeecec8912063163495b4f927624d",
                "md5": "f86d9bca1a08f8e5fcbb9ac8cb7c2ada",
                "blake2b_256": "3d61ef7d11108d92bdba571703010ec97ce8fa93be900ad4dbc896ccf0f46df7"
            },
            "filename": "pymaas-99.99.0.tar.gz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pymaas/MAL-2026-15929.json"