MAL-2026-13262

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-ui/MAL-2026-13262.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13262
Published
2026-08-05T15:31:21Z
Modified
2026-08-05T16:50:22.249637127Z
Summary
Malicious code in devplatform-spa-ui (npm)
Details

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

Source: amazon-inspector (fffe57b043e47164a9c84d67bd7966a487e721806e019349a157b5b0f1d2e428)

On require, _vendor.js selects a per-OS payload URL, fetches a binary from rotating *.workers.dev hosts (with a DNS-TXT base64 fallback via *.dl.wel1.ru), writes it to a hidden temp path (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the Windows equivalent. Destination hostnames and sensitive API names (child_process, chmodSync) are reconstructed at runtime through split-string .join('') concatenation to evade scanners. lib/telemetry.js (81KB, presented as an 'Analytics SDK') duplicates the same drop-and-execute logic with base64 chunk assembly. No hash or signature verification; destinations are not the publisher; behavior is unrelated to the advertised SPA UI toolkit purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T15:31:21Z",
            "id": "IN-MAL-2026-015731",
            "import_time": "2026-08-05T16:13:37.273698037Z",
            "versions": [
                "35.8.2"
            ],
            "source": "amazon-inspector",
            "sha256": "fffe57b043e47164a9c84d67bd7966a487e721806e019349a157b5b0f1d2e428"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-spa-ui

Package

Name
devplatform-spa-ui
View open source insights on deps.dev
Purl
pkg:npm/devplatform-spa-ui

Affected ranges

Affected versions

35.*
35.8.2

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-spa-ui-35.8.2.tgz",
            "hashes": {
                "sha512_sri": "sha512-AksjhwtAtsMkaARbZNjJFL2EUpzszH7LcJ0LLV05c3D2WbdsecEZlfed4ozO4VdWcb8ny7FpccNwXeqfMsJvcQ==",
                "sha1": "62e7a383fac5ab2c13bfb0ff2681f9fe199b554c"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_vendor.js",
            "tlsh": "82b1a5a9066a70198b7097e487275816f55be5633380d294fb6c99881fb2534c3b2efc",
            "sha256": "4357a7c2b9f73dcd8905d1f1299487fc91653a4fca1402ad106cad4709dc1ccd"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "eb835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "c58fdb04bfaf71ac77dcb01971d831a19a47b7717fba21a7997e8f32ff3164d8"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-ui/MAL-2026-13262.json"