MAL-2026-17553

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-ikomdq-polyfill/MAL-2026-17553.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17553
Published
2026-10-05T03:36:15Z
Modified
2026-10-05T04:15:05Z
Summary
Malicious code in css-ikomdq-polyfill (npm)
Details

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

Source: amazon-inspector (255cceca3ca8631c9b225745c5b64a71fd6c09b60fa3ad95b419fccb66f035f2)

The package presents itself as a CSS polyfill but ships thunderboltRegistry.js, which on require() executes a top-level IIFE that runs id, whoami, uname -a, ifconfig/ip addr, and reads /etc/hosts via child_process.execSync, then posts the command outputs together with hostname, node version, platform, and pid to the hardcoded plain-HTTP endpoint http://dxpoc.gt.tc/callback.php/ using fetch. The module also deletes its own entries from require.cache so the payload re-runs on each require() rather than being memoized. The package name and the thunderbolt/editor/corvid Proxy facade impersonate Wix parastorage registry modules to encourage accidental installation.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021018",
            "import_time":  "2026-10-05T03:57:39.10921433Z",
            "modified_time":  "2026-10-05T03:36:15Z",
            "sha256":  "255cceca3ca8631c9b225745c5b64a71fd6c09b60fa3ad95b419fccb66f035f2",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-ikomdq-polyfill

Package

Name
css-ikomdq-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-ikomdq-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-ikomdq-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "b83a62107dde2ec224c350e1e870a46461948d87",
                "sha512_sri":  "sha512-jRUk8onAmbjznZi/Iq1AFTAd+snjNFq2dqcY7elLWRhEwVFqdaG+pEeN84bKV9r+UF3jbWNOqI1m1VtVO47eHQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-ikomdq-polyfill/MAL-2026-17553.json"