MAL-2026-902

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/crc32fast/MAL-2026-902.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-902
Published
2026-02-14T13:26:41Z
Modified
2026-02-14T14:23:09.911450Z
Summary
Malicious code in crc32fast (PyPI)
Details

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

Source: kam193 (3b89c674974bf58c7388a27bf1c6ea954a890de45a3e9ba4830c1eada3a3ea6a)

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 (01c9a259f7b88e992aee84db09b728b15f74a517857ab5b3aaa16f725a9debbd)

The OpenSSF Package Analysis project identified 'crc32fast' @ 1.0.99 (pypi) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

  • The package executes one or more commands associated with malicious behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-02-14T13:47:54.888067435Z",
            "modified_time": "2026-02-14T13:26:41Z",
            "source": "ossf-package-analysis",
            "sha256": "01c9a259f7b88e992aee84db09b728b15f74a517857ab5b3aaa16f725a9debbd",
            "versions": [
                "1.0.99"
            ]
        },
        {
            "import_time": "2026-02-14T14:11:25.333664625Z",
            "modified_time": "2026-02-14T13:35:17.052646Z",
            "source": "kam193",
            "sha256": "3b89c674974bf58c7388a27bf1c6ea954a890de45a3e9ba4830c1eada3a3ea6a",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/crc32fast",
            "versions": [
                "1.0.99"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / crc32fast

Package

Name
crc32fast
View open source insights on deps.dev
Purl
pkg:pypi/crc32fast

Affected ranges

Affected versions

1.*
1.0.99

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/crc32fast/MAL-2026-902.json"