MAL-2026-1991

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/nsscache/MAL-2026-1991.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-1991
Published
2026-03-20T10:36:26Z
Modified
2026-03-20T11:31:56.695771Z
Summary
Malicious code in nsscache (PyPI)
Details

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

Source: kam193 (f799f92bcb0f24e47655a4a38d97a8981bad8f31f28f7d82a5378ae8aa0f1c74)

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": [
        {
            "sha256": "f799f92bcb0f24e47655a4a38d97a8981bad8f31f28f7d82a5378ae8aa0f1c74",
            "source": "kam193",
            "modified_time": "2026-03-20T10:36:26.827196Z",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/nsscache",
            "import_time": "2026-03-20T11:14:51.084519685Z",
            "versions": [
                "9.9.9"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / nsscache

Package

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

Affected ranges

Affected versions

9.*
9.9.9

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/nsscache/MAL-2026-1991.json"