MAL-2026-17557

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-svqggc-polyfill/MAL-2026-17557.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17557
Published
2026-10-05T03:37:03Z
Modified
2026-10-05T04:15:05Z
Summary
Malicious code in css-svqggc-polyfill (npm)
Details

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

Source: amazon-inspector (6b23cf39720388bcf9f26621bd52e256e18a011bf3b6821b7d9f5f60115b9663)

Package masquerades as a CSS polyfill while impersonating internal Wix Thunderbolt registry modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, and other namespace stubs), with a shipped registry-manifest pointing those names at parastorage.com URLs under this package's own name — a dependency-confusion shape. thunderboltRegistry.js runs an IIFE on require that purges its own entries from require.cache so each require re-runs the payload, obtains child_process via multiple fallbacks (including constructing a fresh Module instance to bypass sandboxed require stubs), and executes reconnaissance commands (id, whoami, uname -a, ifconfig/ip addr, /etc/hosts) via execSync. The command output plus host beacon fields (node version, platform, pid, hostname, site) are sent over cleartext HTTP via fetch GET to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The Proxy-based stub exports ensure the import appears to succeed silently after exfiltration.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021023",
            "import_time":  "2026-10-05T03:57:39.532422737Z",
            "modified_time":  "2026-10-05T03:37:03Z",
            "sha256":  "6b23cf39720388bcf9f26621bd52e256e18a011bf3b6821b7d9f5f60115b9663",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-svqggc-polyfill

Package

Name
css-svqggc-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-svqggc-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"
        },
        {
            "path":  "registry-manifest.min.json",
            "sha256":  "5d173e4ca9713636b5060832d6c8b8299136ad3115b7affcd0b7b88ddefec879",
            "tlsh":  "2301a5dd0c0a41fa1bc05acf4402fa0af7038dc60cedd672952141a078245f102febbb"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "css-svqggc-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "87eb3d48163b2973abfc3731895cef65d40cdeb4",
                "sha512_sri":  "sha512-zGStGUofphvCP3Ki3dp//PLu48U+P2QokbHMXFf5GGiNKvVAmnGYTDOxOvFKpTSs4j3mKrsz5avoHdRW37UZzw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-svqggc-polyfill/MAL-2026-17557.json"