MAL-2026-12568

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-input-email-logic/MAL-2026-12568.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12568
Published
2026-08-05T14:12:40Z
Modified
2026-08-05T14:35:28.124896632Z
Summary
Malicious code in checkout-input-email-logic (npm)
Details

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

Source: amazon-inspector (f1f845143d537f4590a200285bce69801a27e5c73a1080212bae23c392c43841)

On require, bridge.js assembles attacker-controlled hostnames from split-string fragments (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT chunked-base64 fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. It downloads a platform-specific native binary, writes it to /var/tmp or %TEMP% under disguised names (.cache<hex> or dotnetdiag<hex>.exe), chmods 0755, and spawns it detached via spawn('/bin/sh', ['-c', fp+' &']) or cmd.exe /c start /b. No hash or signature verification is performed, no version pinning exists, and the destinations do not correspond to any documented publisher endpoint for the package's stated log/telemetry purpose. Execution is gated behind a stamp file in TEMP ('.analyticsstate' with a 23340s TTL) and behaves conditionally on DISABLETELEMETRY/ANALYTICSOPTOUT/DONOTTRACK environment variables used as cover framing. Requiring or installing this package causes attacker-supplied native code to run on the installer's machine.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "f1f845143d537f4590a200285bce69801a27e5c73a1080212bae23c392c43841",
            "id": "IN-MAL-2026-015209",
            "modified_time": "2026-08-05T14:12:40Z",
            "import_time": "2026-08-05T14:20:13.086760696Z",
            "source": "amazon-inspector",
            "versions": [
                "35.8.2"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / checkout-input-email-logic

Package

Name
checkout-input-email-logic
View open source insights on deps.dev
Purl
pkg:npm/checkout-input-email-logic

Affected ranges

Affected versions

35.*
35.8.2

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "b2e193c32ac116a7c3576efb3dd631ee86722f5f8fc4497ed5e6f44a48ec43ea",
            "path": "_bridge.js",
            "tlsh": "39a1879916aa70054b7097e4871b4816f65bf66337c0d684fb5c69881f7252483b2efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-SE6pDNi4DsYqp4SPxZQjghpaZUJxG7qpDd2mZkqIULmv8shhaUEo1T9lvFZqBiotbPHPP7uZ6Dir2P/9iL/t9Q==",
                "sha1": "f4ea924a54e9148571d28976966c703856fefe5d"
            },
            "filename": "checkout-input-email-logic-35.8.2.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-input-email-logic/MAL-2026-12568.json"