MAL-2026-17547

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-at-scope-polyfill/MAL-2026-17547.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17547
Published
2026-10-05T03:37:15Z
Modified
2026-10-05T04:15:05Z
Summary
Malicious code in css-at-scope-polyfill (npm)
Details

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

Source: amazon-inspector (c4d8d974b7fabf04fa662971cd8041fb76775bf5ed2902cbbffed0f881e2036d)

Package is published under a CSS-polyfill name but ships thunderboltRegistry.js, which exports Wix internal registry module names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, etc.) so that a build resolving any of those names will load this file. On require(), an IIFE runs child_process.execSync to collect id, whoami, uname, ifconfig/ip addr, and the contents of /etc/hosts, plus a beacon containing node version, platform, pid, and hostname, and POSTs the output via fetch to the hardcoded HTTP endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The payload clears any require.cache entries referencing 'thunderboltRegistry' and acquires child_process through three fallbacks, including instantiating a new Module via module.constructor to bypass mocks or sandboxes. The declared CSS-polyfill purpose has no relation to this behavior; the shape is a dependency-confusion squat against internal Wix modules.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021024",
            "import_time":  "2026-10-05T03:57:39.597500531Z",
            "modified_time":  "2026-10-05T03:37:15Z",
            "sha256":  "c4d8d974b7fabf04fa662971cd8041fb76775bf5ed2902cbbffed0f881e2036d",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-at-scope-polyfill

Package

Name
css-at-scope-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-at-scope-polyfill

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "thunderboltRegistry.js",
            "sha256":  "a485cb48081ea590cab385a405886cfe6f30af7d415f30bc8d7937ace461b928",
            "tlsh":  "e87154a5b99df02065c33438cb7f4049b4bbc6672d6caee0744899b01f7985c01be6f8"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "css-at-scope-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "5e679fcafebeb0bafea3ce347f5925a124661831",
                "sha512_sri":  "sha512-gJRIBJ4jedfAMCc6/qOOoDOgtnSKR459y9B9QJKzPAUVDoAEhaFopx46jHmwCKBpXSeiKwodBEKGry8zkiyy4A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-at-scope-polyfill/MAL-2026-17547.json"