MAL-2026-1225

See a problem?

Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/urllib-slim/MAL-2026-1225.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-1225

Published

2026-03-03T17:51:17Z

Modified

2026-03-03T20:18:40.386614Z

Summary

Malicious code in urllib-slim (PyPI)

Details

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

Source: kam193 (ab38fb394a17f30f0503cdeb9f982f99aaec2c5f43496b6e5d7ccd505d926915)

During installation, the package starts obfuscated code that downloads and runs remote executables in specific environments - in older packages - attempts to exfiltrate some basic information using DNS requests and then likely cover tracks by installing a similarly named package from private repository

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

Campaign: 2026-02-urllib-slim

Reasons (based on the campaign):

typosquatting
Downloads and executes a remote executable.
obfuscation
dependency-confusion

Database specific

{
    "malicious-packages-origins": [
        {
            "source": "kam193",
            "sha256": "ab38fb394a17f30f0503cdeb9f982f99aaec2c5f43496b6e5d7ccd505d926915",
            "versions": [
                "9.31",
                "9.32",
                "9.33",
                "9.34",
                "9.35"
            ],
            "import_time": "2026-03-03T18:20:16.086769969Z",
            "modified_time": "2026-03-03T17:52:53.800886Z",
            "id": "pypi/2026-02-urllib-slim/urllib-slim"
        },
        {
            "source": "kam193",
            "sha256": "af9dfb22d0369590148408b736b7cdc45bf01c59f22fe6ee498809384081c452",
            "versions": [
                "9.31",
                "9.32",
                "9.33",
                "9.34",
                "9.35",
                "9.36"
            ],
            "import_time": "2026-03-03T19:20:04.717631436Z",
            "modified_time": "2026-03-03T18:32:08.971007Z",
            "id": "pypi/2026-02-urllib-slim/urllib-slim"
        }
    ],
    "iocs": {
        "domains": [
            "1r.vc",
            "i.1r.vc"
        ],
        "urls": [
            "https://storage.googleapis.com/py-pi/python_mac",
            "https://storage.googleapis.com/py-pi/python_rhel",
            "https://storage.googleapis.com/py-pi/python_win"
        ]
    }
}

References

Credits

- Kamil Mańkowski (kam193) - REPORTER
- - https://github.com/kam193
  - https://bad-packages.kam193.eu/

Affected packages

PyPI / urllib-slim

Package

Name: urllib-slim; View open source insights on deps.dev
Purl: pkg:pypi/urllib-slim

Affected ranges

Affected versions

9.*

9.31

9.32

9.33

9.34

9.35

9.36

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/urllib-slim/MAL-2026-1225.json"