MAL-2026-17551

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-gvqmfn-polyfill/MAL-2026-17551.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17551
Published
2026-10-05T03:36:27Z
Modified
2026-10-05T04:15:05Z
Summary
Malicious code in css-gvqmfn-polyfill (npm)
Details

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

Source: amazon-inspector (ffb3f332a818748252e49dcf21ffb6949c531afd401ee697cc08ba00a067ae30)

css-gvqmfn-polyfill mimics Wix internal @wix/thunderbolt-* CSS polyfill naming and ships a Proxy-based cover stub that re-exports registry names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, etc.) as no-op functions to appear functional. On require of thunderboltRegistry.js, an IIFE unconditionally executes id, whoami, uname -a, ifconfig/ip addr, and cat /etc/hosts via child_process, collects os.hostname, Node version, platform, and pid, and sends the output together with an rce-poc beacon to the hardcoded attacker endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f over plain HTTP. The accompanying registry-manifest.min.json points sibling registries to parastorage.com URLs that do not host this file, consistent with a dependency-confusion lure targeting Wix build environments.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021019",
            "import_time":  "2026-10-05T03:57:39.185383499Z",
            "modified_time":  "2026-10-05T03:36:27Z",
            "sha256":  "ffb3f332a818748252e49dcf21ffb6949c531afd401ee697cc08ba00a067ae30",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-gvqmfn-polyfill

Package

Name
css-gvqmfn-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-gvqmfn-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-gvqmfn-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "30f2ab1a20f691f72c8fca3449889030e47c80f4",
                "sha512_sri":  "sha512-gEh2j/WJZyUNAlzNFfSfSFxgB/8V5axZdaHpHnUAK+4vT6RoQDWCxfTyN9uBXJG4vTt6sL5ae6DiE254G5ViXA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-gvqmfn-polyfill/MAL-2026-17551.json"