MAL-2026-17484

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-relative-color-util/MAL-2026-17484.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17484
Published
2026-10-04T23:14:22Z
Modified
2026-10-04T23:30:04Z
Summary
Malicious code in css-relative-color-util (npm)
Details

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

Source: amazon-inspector (ee0efef48c7d56201a037b237f11ec712853f86e74f6a00ef8011732b31363f1)

The package name advertises a CSS utility, but thunderboltRegistry.js runs an IIFE on module load that uses child_process.execSync to execute whoami, uname -a, cat /etc/hosts, and ifconfig/ip addr, then exfiltrates the output together with os.hostname and the Node version to a hardcoded webhook at https://dxpoc.gt.tc/callback.php/ via fetch and to an *.oast.live DNS collector via dns.resolve. The loader deletes any require.cache entry containing 'thunderboltRegistry' so the IIFE re-fires on subsequent requires, and falls back to node:child_process and new module.constructor().require('child_process') to obtain the exec primitive. The package also exports stubs named thunderboltRegistry, siteAssetsRegistry, documentManagementRegistry, editorRegistry, corvidRegistry and similar, matching internal Wix thunderbolt module names, with a registry-manifest.min.json pointing at static.parastorage.com unpkg paths — a dependency-confusion shape targeting an internal namespace. The declared CSS-utility purpose is unrelated to any of this behavior.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020887",
            "import_time":  "2026-10-04T23:16:30.482026901Z",
            "modified_time":  "2026-10-04T23:14:22Z",
            "sha256":  "ee0efef48c7d56201a037b237f11ec712853f86e74f6a00ef8011732b31363f1",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-relative-color-util

Package

Name
css-relative-color-util
View open source insights on deps.dev
Purl
pkg:npm/css-relative-color-util

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":  "e54f3934d81e0b633fb5aefdf27b2c6baf589f2474a63c5e10ab7d0b1060eb95",
            "tlsh":  "088150aa769db01596837438cdff0049a0b7d9632c186fd0a448a5f12f7493c16bb8f4"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "css-relative-color-util-1.0.0.tgz",
            "hashes":  {
                "sha1":  "0829176fc39beb8c4deda365309b287af7dfff60",
                "sha512_sri":  "sha512-M//0qu+XXzFxh820EeAF3dr43PkYMdL1DeyDEfWtZCY1U6HryMZYhb711Mda/lpntbBG78ZVjwwSiyrcdVLW+g=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-relative-color-util/MAL-2026-17484.json"