MAL-2026-4195

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/instal/MAL-2026-4195.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4195
Published
2026-05-20T19:15:56Z
Modified
2026-05-20T20:30:56.149319915Z
Summary
Malicious code in instal (PyPI)
Details

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

Source: kam193 (988f86dc0694b7d27a640809cef5d04ed431a36bb02bb02e69e20724a20db2b9)

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.

Source: ossf-package-analysis (4563e8e641a6f28c65cfedaf9af2b00744113c440f071f5f22ea78f0484bf763)

The OpenSSF Package Analysis project identified 'instal' @ 1.3.5 (pypi) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "4563e8e641a6f28c65cfedaf9af2b00744113c440f071f5f22ea78f0484bf763",
            "versions": [
                "1.3.5"
            ],
            "import_time": "2026-05-20T19:19:25.4000307Z",
            "modified_time": "2026-05-20T19:15:56Z",
            "source": "ossf-package-analysis"
        },
        {
            "versions": [
                "1.3.5"
            ],
            "id": "pypi/GENERIC-standard-pypi-install-pentest/instal",
            "modified_time": "2026-05-20T19:19:18.399583Z",
            "sha256": "988f86dc0694b7d27a640809cef5d04ed431a36bb02bb02e69e20724a20db2b9",
            "import_time": "2026-05-20T20:18:04.310434614Z",
            "source": "kam193"
        }
    ]
}
References
Credits

Affected packages

PyPI / instal

Package

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

Affected ranges

Affected versions

1.*
1.3.5

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/instal/MAL-2026-4195.json"