MAL-2026-12870

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-dangerously-html/MAL-2026-12870.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12870
Aliases
  • GHSA-h385-qp77-g974
Published
2026-08-05T14:58:31Z
Modified
2026-08-06T01:20:16.179408256Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-dangerously-html (npm)
Details

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

Source: amazon-inspector (168aaa53563331be51ccf856023735e18048226dacc413d15a9252e1f1c085c9)

On any require() of this package, index.js loads compat.js which unconditionally downloads a platform-specific binary from hardcoded Cloudflare Workers (oob-worker.cf101-.workers.dev, oob-worker.cf102-.workers.dev, oob-worker.cf99-9b3.workers.dev) and *.dl.wel1.ru hosts (sdk, ext, pkg, net subdomains), with a DNS-TXT base64 fallback channel (c.<domain>, 0.<domain>, 1.<domain>... TXT records reassembled and base64-decoded). Destination hostnames are assembled at runtime from split-string fragments joined together to evade static analysis. The downloaded binary is written to /var/tmp or the OS temp directory under disguising names (.cache<hex>, dotnetdiag<hex>.exe), chmod 0755, and spawned detached via /bin/sh -c or cmd /c start /b. The package name references legitimate BNPL block terminology as cover; the actual behavior is a load-time binary dropper with obfuscated multi-channel C2.

Source: ghsa-malware (9aec51aa877e8f15174b85040adcbd22943e4667d077c9ac5e5cbe18d88443df)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-05T15:19:55.759897859Z",
            "modified_time": "2026-08-05T14:58:31Z",
            "sha256": "168aaa53563331be51ccf856023735e18048226dacc413d15a9252e1f1c085c9",
            "id": "IN-MAL-2026-015518",
            "versions": [
                "35.2.4"
            ],
            "source": "amazon-inspector"
        },
        {
            "source": "ghsa-malware",
            "modified_time": "2026-08-05T19:07:04Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-h385-qp77-g974",
            "sha256": "9aec51aa877e8f15174b85040adcbd22943e4667d077c9ac5e5cbe18d88443df",
            "import_time": "2026-08-06T00:58:53.382521174Z"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-dangerously-html

Package

Name
bnpl-blocks-atom-bnpl-dangerously-html
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-atom-bnpl-dangerously-html

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

35.*
35.2.4

Database specific

cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-Q9KCMfN8QCuJZvGqJHgwpthlA50N+50Ge0G7pTkTz/jgAxBEKRm1qwEFG1VBpFY0WxE5yUOngQg5qo/kpMwqtA==",
                "sha1": "9df925118e067202ff28245cb8ed268c1da43b79"
            },
            "filename": "bnpl-blocks-atom-bnpl-dangerously-html-35.2.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "sha256": "4fe87f6cd81786c16f8828a206105c4597b122f47402e34be046e32c0e1ff66a",
            "tlsh": "b0b198aa156670194b70dbe4ca176815f55bf66333808284fb9ca5d81fb325483b3efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-dangerously-html/MAL-2026-12870.json"