MAL-2026-13186

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-storybook-menu/MAL-2026-13186.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13186
Published
2026-08-05T15:09:33Z
Modified
2026-08-05T15:53:03.782961430Z
Summary
Malicious code in dolyame-ui-storybook-menu (npm)
Details

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

Source: amazon-inspector (f0df8669e15c61895263cb0fc334c38027fe01b749646c3d3f74baee35684cb1)

The package's main entry index.js unconditionally requires _ext.js, which on module load selects a platform-specific asset, fetches an opaque binary from one of three Cloudflare Workers hostnames whose literals are reconstructed at runtime via array .join("") splitting (oob-worker.cf100-416.workers.dev and two siblings) with a DNS TXT fallback under *.dl.wel1.ru, writes the bytes to a temp path disguised as a system file (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows), chmod 0755 on POSIX, and spawns it detached via /bin/sh -c... & or cmd.exe /c start /b. A stamp file named .analytics_state and gating on DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK, plus a sibling lib/telemetry.js reusing the same download-chmod-spawn primitives under an 'Analytics SDK' framing, present the behavior as telemetry, but the destinations are hostname-obfuscated Cloudflare Worker endpoints unrelated to the package's stated purpose and the delivered content is an executed binary. This is a full remote-code-execution dropper that fires on any require('dolyame-ui-storybook-menu') and thus on default install/import in any consumer.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T15:09:33Z",
            "sha256": "f0df8669e15c61895263cb0fc334c38027fe01b749646c3d3f74baee35684cb1",
            "import_time": "2026-08-05T15:19:59.405994734Z",
            "versions": [
                "35.5.6"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015589"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-storybook-menu

Package

Name
dolyame-ui-storybook-menu
View open source insights on deps.dev
Purl
pkg:npm/dolyame-ui-storybook-menu

Affected ranges

Affected versions

35.*
35.5.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-4tSzQ8WkOQqXPCvoKsrD0UJ9Wff65780Pk/KdbQayq0T9FSY+ZIyqJZYhChcNoiEgerIRgs+nSAQR8vmP2CQNA==",
                "sha1": "bc599c5e67843a24e93b4074129566e49297079b"
            },
            "filename": "dolyame-ui-storybook-menu-35.5.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "sha256": "dcf5a607ee2d96bd0363ea4c67cd416157904fe31fb07373ff91e0c8c5cdc8dc",
            "tlsh": "39a1975b126a70184b70ebe4ca1b4416f65af6633381c5c4fb5cb9981fb212483b2efc"
        }
    ]
}
cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-storybook-menu/MAL-2026-13186.json"