MAL-2026-17487

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-snap-target-polyfill/MAL-2026-17487.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17487
Published
2026-10-04T23:15:33Z
Modified
2026-10-04T23:30:04Z
Summary
Malicious code in css-snap-target-polyfill (npm)
Details

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

Source: amazon-inspector (00c104d427125b4acf88ecb83a58d563507b23bcb716cb87fbf7fc953d816d42)

The package ships thunderboltRegistry.js, which uses child_process and process.platform to collect host information and POSTs it via fetch() to the hardcoded external endpoint http://dxpoc.gt.tc. The destination is unrelated to any CSS polyfill functionality the package name advertises, is served over cleartext HTTP, and is not caller-configurable. This behavior does not correspond to the declared purpose of a CSS snap-target polyfill, which has no legitimate need to execute shell commands or beacon host details to a third-party domain.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020894",
            "import_time":  "2026-10-04T23:16:30.907131478Z",
            "modified_time":  "2026-10-04T23:15:33Z",
            "sha256":  "00c104d427125b4acf88ecb83a58d563507b23bcb716cb87fbf7fc953d816d42",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-snap-target-polyfill

Package

Name
css-snap-target-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-snap-target-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-snap-target-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "720073d7726d9d8f5a3ed04a2ac288edd0d0b560",
                "sha512_sri":  "sha512-/XPntM9AYq8PMebtgxW19QPWjcMwRiwYrNW4U4CeScbV8vzCc46oFedyzM+t5Y4KnCCG86InDZzqKrhwsQl5GA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-snap-target-polyfill/MAL-2026-17487.json"