MAL-2025-191908

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/tosa-serialization-lib/MAL-2025-191908.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2025-191908
Published
2025-10-14T09:40:20Z
Modified
2025-12-31T02:55:21.383941Z
Summary
Malicious code in tosa-serialization-lib (PyPI)
Details

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

Source: kam193 (5badd7c7414eb1f6fbdf1934b42ffe74549daa74508afd092af853097170eb8e)

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": "2025-10-14T09:40:20.057368Z",
            "versions": [
                "2.0.0",
                "0.0.0"
            ],
            "sha256": "d650a23e1c1041143aa2d61e0077351589acf787e8010e7f98f0f77f89c2663e",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/tosa-serialization-lib",
            "source": "kam193",
            "import_time": "2025-12-02T22:30:56.467227327Z"
        },
        {
            "modified_time": "2025-10-14T09:40:20.057368Z",
            "versions": [
                "2.0.0",
                "0.0.0"
            ],
            "sha256": "5badd7c7414eb1f6fbdf1934b42ffe74549daa74508afd092af853097170eb8e",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/tosa-serialization-lib",
            "source": "kam193",
            "import_time": "2025-12-02T23:07:19.653418895Z"
        },
        {
            "modified_time": "2025-10-14T09:40:20.057368Z",
            "versions": [
                "0.0.0",
                "2.0.0"
            ],
            "sha256": "dfaf508511f11ccefd083c8d4f5aa201597d95e562f3ac1cfa323aa35a2814af",
            "id": "pypi/GENERIC-standard-pypi-install-pentest/tosa-serialization-lib",
            "source": "kam193",
            "import_time": "2025-12-30T22:39:04.362600948Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / tosa-serialization-lib

Package

Name
tosa-serialization-lib
View open source insights on deps.dev
Purl
pkg:pypi/tosa-serialization-lib

Affected ranges

Affected versions

0.*
0.0.0
2.*
2.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/tosa-serialization-lib/MAL-2025-191908.json"