MAL-2026-905

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/marshmellows/MAL-2026-905.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-905
Published
2026-02-15T09:25:56Z
Modified
2026-02-19T22:58:20.803864Z
Summary
Malicious code in marshmellows (PyPI)
Details

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

Source: kam193 (92a41b4a9b9f5733eae9cfa5ca9c6802d52d803a1835820ee5098f58419fc18e)

Package is a typosquatting or dependency confusion attempt with a low-harm local-only action, like leaving a flag file.

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-local-typosquatting

Reasons (based on the campaign):

  • dependency-confusion

  • The package overrides the install command in setup.py to execute malicious code during installation.

  • typosquatting

Source: ossf-package-analysis (9db78f8d3a189592589ea859605c544c51d53a09054e4e109a0cc7824339b46d)

The OpenSSF Package Analysis project identified 'marshmellows' @ 1.0.0 (pypi) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.
Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "92a41b4a9b9f5733eae9cfa5ca9c6802d52d803a1835820ee5098f58419fc18e",
            "id": "pypi/GENERIC-local-typosquatting/marshmellows",
            "source": "kam193",
            "import_time": "2026-02-15T09:45:10.969155372Z",
            "modified_time": "2026-02-15T09:29:38.287837Z",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "sha256": "9db78f8d3a189592589ea859605c544c51d53a09054e4e109a0cc7824339b46d",
            "source": "ossf-package-analysis",
            "import_time": "2026-02-19T22:45:35.082872924Z",
            "modified_time": "2026-02-15T09:25:56Z",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / marshmellows

Package

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

Affected ranges

Affected versions

1.*
1.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/marshmellows/MAL-2026-905.json"