MAL-2026-12907

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-component-story-name/MAL-2026-12907.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12907
Published
2026-08-05T14:52:23Z
Modified
2026-08-05T15:50:52.318087050Z
Summary
Malicious code in bnpl-blocks-component-story-name (npm)
Details

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

Source: amazon-inspector (a797e2310dd4df10e11e104dad3fbb135621e9997a5425f480c3c884da59ca6d)

On require of this package, index.js loads polyfill.js which downloads a platform-specific executable from one of four hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT covert-channel fallback that reassembles base64 payload chunks from numeric subdomains of sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under disguised names (dotnetdiag_*.exe,.cache_*), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Destination hostnames are assembled at runtime by joining split string fragments to evade static string scanners. Requiring the package yields arbitrary remote code execution on the installer's host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.2.7"
            ],
            "id": "IN-MAL-2026-015476",
            "import_time": "2026-08-05T15:19:53.456632678Z",
            "modified_time": "2026-08-05T14:52:23Z",
            "source": "amazon-inspector",
            "sha256": "a797e2310dd4df10e11e104dad3fbb135621e9997a5425f480c3c884da59ca6d"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-component-story-name

Package

Name
bnpl-blocks-component-story-name
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-component-story-name

Affected ranges

Affected versions

35.*
35.2.7

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-XMuuWvxYaXU8mXpSvBaMjuxljvUbnkqpYB7VJc1vBRhQbo+ZSN3E2EqCeKCab2DOAEkvOMLqXs1QPpSeyPsTOw==",
                "sha1": "8cc76d9b7752c3c7da96ab4f58de4b8cd60122e2"
            },
            "filename": "bnpl-blocks-component-story-name-35.2.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_polyfill.js",
            "tlsh": "b4a1a86a06aa70184bb0e7e0c71b4826f55af6633781d1c8fb5c95885f7352483b1efc",
            "sha256": "df980dad4068074fe1411edc7a5e01d7f557d0818679e6dc5b8a933ea0f6dde6"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-component-story-name/MAL-2026-12907.json"