MAL-2026-13489

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pydanticc/MAL-2026-13489.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13489
Published
2026-08-07T07:04:59Z
Modified
2026-08-07T12:35:24.849476546Z
Summary
Malicious code in pydanticc (PyPI)
Details

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

Source: amazon-inspector (0bc3a091548db52bab3bf8556e95780b3041aa971b6353d7f31bdb71128915a1)

pydanticc is a typosquat of the popular 'pydantic' package. Its setup.py defines a custom setuptools install command whose body is stored as a base64 string literal and reconstituted at install time via base64.b64decode + compile + exec, concealing the payload from plain reading of setup.py. On Linux, the decoded hook downloads an opaque executable from https://github.com/totti2188/8gp1Q7iZD3h4VW/releases/download/v1.3A/something (a personal GitHub account unrelated to the package's stated purpose), writes it to /tmp/something, marks it executable, and launches it detached via subprocess.Popen with startnewsession=True. The shipped Python module (djangoo/main.py) contains only a trivial hello() print with no pydantic-related functionality, so the package's real effect on installation is arbitrary remote code execution on the installer's host. The unpinned personal-account release URL, base64/exec obfuscation of the URL and Popen call, detached background execution, name-squat of a top-100 package, and stub content together constitute a classic install-time dropper.

Source: kam193 (c16b176d1ba6ee3f4f1680d0678c9933e620f4de18bec7bc9af67978ed737527)

Package imitates name of a popula library. During installation, obfuscated code downloads a malicious executable and starts it. It then exfiltrates at least cryptocurrency wallet data, probably more.

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

Campaign: 2026-08-flasq

Reasons (based on the campaign):

  • typosquatting

  • The package overrides the install command in setup.py to execute malicious code during installation.

  • exfiltration-generic

  • Downloads and executes a remote executable.

  • obfuscation

  • exfiltration-crypto

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "pypi/2026-08-flasq/pydanticc",
            "import_time": "2026-08-07T07:35:19.075614837Z",
            "sha256": "c16b176d1ba6ee3f4f1680d0678c9933e620f4de18bec7bc9af67978ed737527",
            "modified_time": "2026-08-07T07:04:59.702408Z",
            "source": "kam193",
            "versions": [
                "0.1.1",
                "0.1.2",
                "0.2.0",
                "0.3.0"
            ]
        },
        {
            "id": "pypi/2026-08-flasq/pydanticc",
            "import_time": "2026-08-07T08:57:13.35342027Z",
            "sha256": "faf0b5d83a6387044068dd0d4eb61cef977123164e4be406b16bf2c38ac4f9ed",
            "modified_time": "2026-08-07T07:04:59.702408Z",
            "source": "kam193",
            "versions": [
                "0.1.1",
                "0.1.2",
                "0.2.0",
                "0.3.0"
            ]
        },
        {
            "id": "IN-MAL-2026-016901",
            "import_time": "2026-08-07T12:23:26.426157732Z",
            "sha256": "0b849ee630b66e8839acdf0c7830372ba690b80f182434aea2816513ee2b35ad",
            "versions": [
                "0.3.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:15:07Z"
        },
        {
            "id": "IN-MAL-2026-016905",
            "import_time": "2026-08-07T12:23:26.612026649Z",
            "sha256": "0bc3a091548db52bab3bf8556e95780b3041aa971b6353d7f31bdb71128915a1",
            "modified_time": "2026-08-07T12:15:39Z",
            "source": "amazon-inspector",
            "versions": [
                "0.1.2"
            ]
        },
        {
            "id": "IN-MAL-2026-016900",
            "import_time": "2026-08-07T12:23:26.397263297Z",
            "sha256": "341e293bf68c074727878e98df5cad5aad9f711aca022d4e95b5e7723adf4a88",
            "versions": [
                "0.2.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:14:58Z"
        },
        {
            "id": "IN-MAL-2026-016904",
            "import_time": "2026-08-07T12:23:26.581077987Z",
            "sha256": "924a5e8609b73977255f604d1e6f55179d72569ffb2698c8c54af1b258b36a90",
            "versions": [
                "0.1.1"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:15:30Z"
        }
    ],
    "iocs": {
        "ips": [
            "193.70.34.101"
        ],
        "urls": [
            "https://github.com/totti2188/8gp1Q7iZD3h4VW/releases/download/v1.3A/something"
        ]
    }
}
References
Credits

Affected packages

PyPI / pydanticc

Package

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

Affected ranges

Affected versions

0.*
0.1.1
0.1.2
0.2.0
0.3.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "setup.py",
            "tlsh": "a621685f8e6111b47c18c7845553401b1767afa56c2074e4befe23642b8d29dca7f097",
            "sha256": "f08f648a6d275f6e767723384c7628135b1a148a0837c60120be41d2f296bf39"
        }
    ],
    "package_integrity": [
        {
            "filename": "pydanticc-0.3.0.tar.gz",
            "hashes": {
                "sha256": "ad7b749fc925b55e2be3274216e3254927b493393e5e91881dbf614395f8d7c5",
                "blake2b_256": "c0c4d63f38af89e094a1ba207e8308f5e67bd9d1e8ae2bacd6cc662e99fc61d3",
                "md5": "989cd8bb5840cb70890827192d855cd2"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pydanticc/MAL-2026-13489.json"