MAL-2026-1987

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/composer-dev/MAL-2026-1987.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-1987
Published
2026-03-20T10:32:56Z
Modified
2026-03-20T11:31:55.167808Z
Summary
Malicious code in composer-dev (PyPI)
Details

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

Source: kam193 (7be3393e5cd932abe1668adaa58f526e25b1a6ab2ef4945eadeb60e68493c7ef)

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": [
        {
            "modified_time": "2026-03-20T10:32:56.616404Z",
            "versions": [
                "9.9.9"
            ],
            "sha256": "7be3393e5cd932abe1668adaa58f526e25b1a6ab2ef4945eadeb60e68493c7ef",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/composer-dev",
            "source": "kam193",
            "import_time": "2026-03-20T11:14:51.081944594Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / composer-dev

Package

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

Affected ranges

Affected versions

9.*
9.9.9

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/composer-dev/MAL-2026-1987.json"