MAL-2025-6526

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/is-number-object/MAL-2025-6526.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2025-6526
Published
2024-07-26T16:53:30Z
Modified
2026-03-19T12:54:11.893472Z
Summary
Malicious code in is-number-object (PyPI)
Details

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

Source: kam193 (60c891b7eb9d0f5a8ca04cb59f7b91bac36fbcc7df40fcf44b9a46f8c969daf3)

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": "RLMA-2025-03619",
            "import_time": "2025-08-01T10:07:11.93381879Z",
            "sha256": "c0658c6b882b62dbc0951bb4e3b29c2108210a21b29ee38ffd59db424e1f6dc5",
            "source": "reversing-labs",
            "modified_time": "2025-07-31T19:15:22Z",
            "versions": [
                "1.0.8"
            ]
        },
        {
            "id": "pypi/GENERIC-standard-pypi-install-pentest/is-number-object",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "import_time": "2025-12-02T22:30:56.129009596Z",
            "sha256": "3c02be6e910db26635ec0b017be94b6c09973e53e8b31848aa62bd6718b1f047",
            "source": "kam193",
            "modified_time": "2024-07-26T16:53:30Z"
        },
        {
            "id": "pypi/GENERIC-standard-pypi-install-pentest/is-number-object",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "import_time": "2025-12-02T23:07:19.316500197Z",
            "sha256": "60c891b7eb9d0f5a8ca04cb59f7b91bac36fbcc7df40fcf44b9a46f8c969daf3",
            "source": "kam193",
            "modified_time": "2024-07-26T16:53:30Z"
        },
        {
            "id": "pypi/GENERIC-standard-pypi-install-pentest/is-number-object",
            "import_time": "2025-12-10T21:38:58.449107345Z",
            "sha256": "c0301fe2cd588be3a2840800b503be975c9bcf64cf26ddc65d4b26ef81a1e90d",
            "source": "kam193",
            "modified_time": "2024-07-26T16:53:30Z",
            "versions": [
                "1.0.8"
            ]
        },
        {
            "id": "RLUA-2026-00432",
            "import_time": "2026-03-19T12:19:55.587321191Z",
            "sha256": "f28696718b3ca41a2e870fa4824b1f03e693e57fc77838dd633cdd49ecd95688",
            "source": "reversing-labs",
            "modified_time": "2026-03-18T12:15:08Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / is-number-object

Package

Name
is-number-object
View open source insights on deps.dev
Purl
pkg:pypi/is-number-object

Affected ranges

Affected versions

1.*
1.0.8

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/is-number-object/MAL-2025-6526.json"