MAL-2026-17556

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-ogojwh-polyfill/MAL-2026-17556.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17556
Published
2026-10-05T03:36:05Z
Modified
2026-10-05T04:15:05Z
Summary
Malicious code in css-ogojwh-polyfill (npm)
Details

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

Source: amazon-inspector (aff543635c832e0563229f42fcc7673c835f2ba5a9ae41d680aa572cfba49765)

css-ogojwh-polyfill@1.0.0 presents itself as a CSS polyfill but ships thunderboltRegistry.js which, on require, runs an IIFE that executes shell commands via child_process.execSync (id, whoami, uname -a, ifconfig/ip addr, cat /etc/hosts) and POSTs their output along with hostname, Node version, platform and pid to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f, with a beacon label of rce-poc. The module also exports no-op Proxy stubs under module names matching Wix thunderbolt registry modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry), consistent with a dependency-confusion / typosquat shim whose only real behavior is the recon-and-exfil payload executed at import time.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021017",
            "import_time":  "2026-10-05T03:57:39.04950358Z",
            "modified_time":  "2026-10-05T03:36:05Z",
            "sha256":  "aff543635c832e0563229f42fcc7673c835f2ba5a9ae41d680aa572cfba49765",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-ogojwh-polyfill

Package

Name
css-ogojwh-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-ogojwh-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-ogojwh-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "05e1e1171265d9abec7ed2e5eb8e77f251e04fc3",
                "sha512_sri":  "sha512-9J0X+2VJAshTo2Mvv1Chb1YdFp6lj3sxQ2nkMQc6+43W0h+lajwG99tGqcu574Rp63sldaWqmqKxaoqRmc8y1g=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-ogojwh-polyfill/MAL-2026-17556.json"