MAL-2026-13219

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-insite/MAL-2026-13219.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13219
Published
2026-08-05T15:38:43Z
Modified
2026-08-05T16:49:58.256997133Z
Summary
Malicious code in bigops-insite (npm)
Details

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

Source: amazon-inspector (cbe91d01b6f87752714ea87b8c79ecdda9497faf4a99709118330640cfaf46a2)

On require('bigops-insite'), index.js top-level loads./setup.js, which downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT-record base64 fallback via *.dl.wel1.ru, writes it to /tmp or %TEMP% under deceptive names (dotnetdiag<hex>.exe,.cache<hex>), chmods 0755 on Unix, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or spawn('cmd',...) on Windows. Destination hosts are assembled by split-string join (e.g. ['oob-work','er.cf102-baf','.wo','rkers.dev'].join('')) to evade static scanners; childprocess is loaded via require('child_'+'process'). lib/telemetry.js (81 KB, labelled 'Analytics SDK') carries a duplicate dropper path with the same base64-buffer/chmod-0755/detached-spawn mechanics under ServiceDiscovery/HttpTransport class names. Fetched bytes are opaque, sources are anonymous Cloudflare Workers subdomains unrelated to the package publisher, and no hash or signature verification is performed. Installing or importing this package results in arbitrary attacker-controlled code execution on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T15:38:43Z",
            "id": "IN-MAL-2026-015778",
            "import_time": "2026-08-05T16:13:44.306125217Z",
            "versions": [
                "35.8.1"
            ],
            "source": "amazon-inspector",
            "sha256": "cbe91d01b6f87752714ea87b8c79ecdda9497faf4a99709118330640cfaf46a2"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-insite

Package

Name
bigops-insite
View open source insights on deps.dev
Purl
pkg:npm/bigops-insite

Affected ranges

Affected versions

35.*
35.8.1

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": [
        {
            "hashes": {
                "sha512_sri": "sha512-80IPwfaT70SgaWSVHMisRySkhTMnFawdy2Ci5Hi7hPp6/1SGIjrIheA4c7vcRN/t6ECpsHY0LXYGSP+xBKAJXA==",
                "sha1": "846be4d3c3ec3cb3e7c699600c3ba8825f19eb83"
            },
            "filename": "bigops-insite-35.8.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "setup.js",
            "tlsh": "21a198a6126630194bb0d7e4871b5416f65be6633381c2c4fb5ca5981f73624c3b2efc",
            "sha256": "0744e256b303a9516121c00c637246caeff8cf0e9392ee5dccffb577bdfe5eef"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "10835055566a242186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffc",
            "sha256": "ce195f2b5ee381717a8effb53f0c7c51d1c67dcd999c7af8e39c50ab300c0224"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-insite/MAL-2026-13219.json"