MAL-2026-12341

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-search/MAL-2026-12341.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12341
Aliases
  • GHSA-v43r-98qv-2v96
Published
2026-08-05T12:33:09Z
Modified
2026-08-18T00:30:32Z
Summary
Malicious code in bnpl-blocks-independent-bnpl-search (npm)
Details

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

Source: amazon-inspector (e70389e1435e74337e9c402d824a2e90eeb0b2e9f82fc670035973a18382c558)

On require of the package, index.js loads _runtime.js which downloads a platform-specific binary from runtime-assembled *.workers.dev hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), writes it under /tmp or %TEMP% with a disguised name, chmods 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd /c start. Destination hostnames are assembled from split string fragments joined at runtime to evade static URL scanners. When HTTPS fetches fail, the loader falls back to base64-encoded chunks retrieved from DNS TXT records under attacker-controlled subdomains of dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), reassembling and executing the payload from the encoded chunks. A second file lib/telemetry.js shipped in the tarball contains a matching download-decode-chmod-spawn class with the same operator shape.

Source: ghsa-malware (a705b5542aaff7493fd599ff03512f0c2729bb2320e56828318ddfae37b012d3)

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": [
        {
            "id": "IN-MAL-2026-014702",
            "import_time": "2026-08-05T13:08:39.089838592Z",
            "modified_time": "2026-08-05T12:33:09Z",
            "sha256": "e70389e1435e74337e9c402d824a2e90eeb0b2e9f82fc670035973a18382c558",
            "source": "amazon-inspector",
            "versions": [
                "20.2.9"
            ]
        },
        {
            "id": "GHSA-v43r-98qv-2v96",
            "import_time": "2026-08-18T00:20:04.640973786Z",
            "modified_time": "2026-08-17T16:03:55Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "a705b5542aaff7493fd599ff03512f0c2729bb2320e56828318ddfae37b012d3",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-independent-bnpl-search

Package

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

Affected ranges

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

Affected versions

20.*
20.2.9

Database specific

cwes 
[
    {
        "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.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "cc7d0fc6ed8c55e518030eb370c8c90d630104f242b03608a71b35d20423238e",
            "tlsh": "a7a1b79a16a971094bb0ebe4c7178416f55bf26333808281fb9ca5984f7302483b1efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "da2e6958a1151859801ed43a526368200bf08b1902f2e157afef870c3561da4a",
            "tlsh": "1e835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-independent-bnpl-search-20.2.9.tgz",
            "hashes": {
                "sha1": "8ec135ce25ddc0f31fa193971b4d84df780ddeda",
                "sha512_sri": "sha512-LbyurdD6WvBTz5qqdw7813OUOJYxaiLyhty4c6C7kpEoir4xA1mck5ZzxgqIpNIeYlS90TuKZA7ViIWUOLQFBQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-search/MAL-2026-12341.json"