MAL-2026-2945

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/moonbit-locale-compat/MAL-2026-2945.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-2945

Published

2026-04-20T08:12:08Z

Modified

2026-04-20T09:47:03.520089Z

Summary

Malicious code in moonbit-locale-compat (PyPI)

Details

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

Source: kam193 (d42bb32adb1fb5f388368b9e4ab382bfbc8cd7f62dab4c70a8563a448ce9c2af)

Campaign includes a chain of dependencies that finally exfiltrate sensitive environment variables to a hardcoded GitHub repository as exfiltration target, and in specific environments also start a reverse shell. It appears to be targeting specifically one GitHub project, where the front-end package was included in a PR.

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

Campaign: 2026-04-moonbit-locale-compat

Reasons (based on the campaign):

The malicious code is intentionally included in a dependency of the package
The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.
exfiltration-env-variables

Database specific

{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-04-20T08:12:08.76337Z",
            "versions": [
                "0.2.1",
                "0.2.3",
                "0.2.4"
            ],
            "sha256": "d42bb32adb1fb5f388368b9e4ab382bfbc8cd7f62dab4c70a8563a448ce9c2af",
            "id": "pypi/2026-04-moonbit-locale-compat/moonbit-locale-compat",
            "source": "kam193",
            "import_time": "2026-04-20T08:51:57.122908508Z"
        },
        {
            "modified_time": "2026-04-20T08:12:08.76337Z",
            "versions": [
                "0.2.1",
                "0.2.3",
                "0.2.4"
            ],
            "sha256": "d78a796f48577a4aacd59312b19e5aba799631ce77b36bebb5c64c4e523cd9b8",
            "id": "pypi/2026-04-moonbit-locale-compat/moonbit-locale-compat",
            "source": "kam193",
            "import_time": "2026-04-20T09:41:09.786566586Z"
        }
    ]
}

References

Credits

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

Affected packages

PyPI / moonbit-locale-compat

Package

Name: moonbit-locale-compat; View open source insights on deps.dev
Purl: pkg:pypi/moonbit-locale-compat

Affected ranges

Affected versions

0.*

0.2.1

0.2.3

0.2.4

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/moonbit-locale-compat/MAL-2026-2945.json"