MAL-2026-11139

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/kordyn/MAL-2026-11139.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-11139
Published
2026-07-28T13:39:51Z
Modified
2026-07-28T14:37:01.549723644Z
Summary
Malicious code in kordyn (npm)
Details

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

Source: amazon-inspector (52bb92157f869a5e1da58a19c88743989d44703201f8d1df250c2543b70b6be3)

The package's main entry (index.mjs) contains a chunked base64 blob whose decoded bytes are a Windows PE64 executable (MZ/PE header confirmed, including the 'This program cannot be run in DOS mode' stub). At import time, when running under Linux with a WSL environment detected via existence of /mnt/c, the module writes this embedded binary to /mnt/c/Users/<user>/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup/vite-native-helper.exe. Placement into the Windows Startup folder causes the binary to auto-execute on the next Windows login of the developer whose WSL environment imported the package, giving the publisher code execution on the Windows host. The package.json advertises the module as a 'dependency-free streak counting utility' and the README describes it as an empty placeholder; the PE payload and the WSL persistence path are entirely undocumented. The filename 'vite-native-helper.exe' is a cover-story name unrelated to the package's stated purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "0.9.16"
            ],
            "import_time": "2026-07-28T14:20:00.484463246Z",
            "sha256": "52bb92157f869a5e1da58a19c88743989d44703201f8d1df250c2543b70b6be3",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-010944",
            "modified_time": "2026-07-28T13:39:58Z"
        },
        {
            "versions": [
                "0.9.18"
            ],
            "import_time": "2026-07-28T14:20:00.383666267Z",
            "sha256": "69e0afd1a9b99d3cabe8090a7576a0a1e1b43fe0d1946d02995cac41751214aa",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-010943",
            "modified_time": "2026-07-28T13:39:51Z"
        }
    ]
}
References
Credits

Affected packages

npm / kordyn

Package

Name
kordyn
View open source insights on deps.dev
Purl
pkg:npm/kordyn

Affected ranges

Affected versions

0.*
0.9.16
0.9.18

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "8035e6565104ac58e9cfc22e405286e3b51d34fbc0a656fc8a3df769456f60a0",
            "tlsh": "66746c72121bfcaa2aec2d80d0012d541e6d2e474624b165ebcbb0fa53ed657cd3d9bc",
            "path": "index.mjs"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/kordyn/MAL-2026-11139.json"