MAL-2026-13016

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-seo-tools/MAL-2026-13016.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13016
Published
2026-08-05T14:37:23Z
Modified
2026-08-05T15:51:43.436902637Z
Summary
Malicious code in bnpl-blocks-seo-tools (npm)
Details

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

Source: amazon-inspector (fafe459f610c3c0c55f043148b4900bc1c70b4f02adfc7a440afbe115ca3b36a)

bnpl-blocks-seo-tools@35.2.3 declares itself an SEO tool but on module load (index.js requires./support.js) fetches a platform-specific native binary from one of several Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT-record fallback channel to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru. The destination hostnames are reconstructed at runtime from split string arrays joined with.join("") to evade static string matching. The fetched binary is written to /tmp or %TEMP% under a disguised name (.cache<hex> on POSIX, dotnetdiag<hex>.exe on Windows mimicking a.NET diagnostics tool), chmod 0755, and spawned detached with stdio ignored via spawn("/bin/sh") / spawn("cmd"). Execution is gated by a /tmp stamp file for once-per-6h cadence and suppressed when DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK are set, reducing detection footprint. The stated package purpose has no relationship to fetching and executing an unsigned native binary.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "fafe459f610c3c0c55f043148b4900bc1c70b4f02adfc7a440afbe115ca3b36a",
            "id": "IN-MAL-2026-015374",
            "modified_time": "2026-08-05T14:37:23Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:47.944390662Z",
            "versions": [
                "35.2.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-seo-tools

Package

Name
bnpl-blocks-seo-tools
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-seo-tools

Affected ranges

Affected versions

35.*
35.2.3

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "19549929b58a8b8a34a0a271df75ed61c26158382e3525112257de26b206395d",
            "path": "_support.js",
            "tlsh": "93b1859a156a30198bb0e7e0c717581af65ff6633380c2d8fb9c65981f7612483b1eec"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-EOO78RPRsq5kwQOwRNDwrghJYz2scueDflTfzFDpN0BJJ0XXJv5f7HKaYs8xq3eU/Wmy39AdXxmsCtLOpx9C2A==",
                "sha1": "b7b18a1f011a13b20eb3e39357a5b59101d7bf13"
            },
            "filename": "bnpl-blocks-seo-tools-35.2.3.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/bnpl-blocks-seo-tools/MAL-2026-13016.json"