MAL-2026-13246

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-timeline-commons/MAL-2026-13246.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13246
Published
2026-08-05T15:35:21Z
Modified
2026-08-05T16:50:10.449274492Z
Summary
Malicious code in bigops-products-timeline-commons (npm)
Details

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

Source: amazon-inspector (83a98df74705a505fc378b760c3560eea108ccdce63e33c8733b56730efe324e)

The package advertises itself as shared primitive types with a trivial no-op class in index.js, but index.js unconditionally require()s loader.js, whose top-level bootstrap runs on any import. The loader assembles hostnames from split string fragments joined at runtime to hide them from static scanners, resolving to Cloudflare Workers subdomains such as oob-worker.cf99-9b3.workers.dev, with additional *.dl.wel1.ru fallbacks and a DNS TXT-record chunked download channel as covert transport. It selects a platform-specific binary (linuxx64, linuxarm64, darwin, win32), downloads it over HTTPS without pinning, hash, or signature verification, writes it to /var/tmp or %TEMP% under disguised names impersonating legitimate tooling (dotnetdiag<hex>.exe on Windows,.cache<hex> or.analytics_state on Unix), chmods it 0o755, and spawns it detached via /bin/sh -c or cmd with unref(). The library API surface is a decoy for this import-time loader side effect. The combination of unconditional import-time execution, obfuscated attacker-controlled destinations, DNS covert-channel fallback, disguised filenames, and unverified remote binary execution matches an install/import-time RCE dropper.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015756",
            "import_time": "2026-08-05T16:13:41.260889991Z",
            "sha256": "83a98df74705a505fc378b760c3560eea108ccdce63e33c8733b56730efe324e",
            "modified_time": "2026-08-05T15:35:21Z",
            "versions": [
                "35.1.6"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-products-timeline-commons

Package

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

Affected ranges

Affected versions

35.*
35.1.6

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-9k6Lm0+4ACppXXJnUDOQ81oFll0HpoW8l+M8j/Sp+2fI10GIb3c5oJ5CWLsDLBsMl5orOwoO/ba6RVhzPaEIlA==",
                "sha1": "06dbd23bc5066cf077ae645ed7d298dec06356a0"
            },
            "filename": "bigops-products-timeline-commons-35.1.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_loader.js",
            "sha256": "2b509ac77c89cfb80b47516a21e55e39ad63252f9cb3e9f6cf721c66aeaf41e5",
            "tlsh": "d1b1b89a166670088bb0d7e487275415f65ae7633780c2d4fb5ca9981fb712483b2efc"
        },
        {
            "path": "index.js",
            "sha256": "296c2c89522c83899782beb822cc58e1d7a3ac41a5d8d99646c346e976d9b772",
            "tlsh": "87f0818654dee4528a78a2fade361152f9628a324b075154bd8550ff0ea0870439ce7b"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-timeline-commons/MAL-2026-13246.json"