MAL-2026-17517

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/popover-anchor-polyfill/MAL-2026-17517.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17517
Published
2026-10-04T23:26:32Z
Modified
2026-10-04T23:45:19Z
Summary
Malicious code in popover-anchor-polyfill (npm)
Details

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

Source: amazon-inspector (31e270ae326e5c45ebeb5fcf7bc9ff96126908c194bef5f280a4028fff0e9ed9)

The package advertises itself as a 'popover anchor positioning polyfill' but ships thunderboltRegistry.js, which executes an IIFE on module load that spawns shell commands via child_process.execSync (id, whoami, uname -a, ifconfig/ip addr) and reads /etc/hosts, then transmits each command's output together with hostname, Node version, platform, and pid over plain HTTP GET requests to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/ef9ea0e191006f3cc6670720c99c26f3. The require path uses cache-bypass tricks (deleting require.cache entries matching 'thunderboltRegistry' and manually constructing a fresh Module to re-resolve child_process) to defeat mocking or interception. Sibling stub files and a registry-manifest.min.json impersonate Wix thunderbolt internal registry names (thunderboltRegistry, siteAssetsRegistry, documentManagementRegistry, editorRegistry, corvidRegistry) and reference static.parastorage.com, indicating a dependency-confusion lure targeting Wix build pipelines. The declared polyfill purpose does not match the shipped Wix-internal namespace exports, and no popover-polyfill functionality is implemented.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020961",
            "import_time":  "2026-10-04T23:40:46.178965405Z",
            "modified_time":  "2026-10-04T23:26:32Z",
            "sha256":  "31e270ae326e5c45ebeb5fcf7bc9ff96126908c194bef5f280a4028fff0e9ed9",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / popover-anchor-polyfill

Package

Name
popover-anchor-polyfill
View open source insights on deps.dev
Purl
pkg:npm/popover-anchor-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":  "b5389ce14f205c3930883356fdb46e32a129e17e008c100eae468409b3afaa4e",
            "tlsh":  "697144a5b99df02165c33438cb7f4049b4bbc6672d6caee0744999b01f7985c01be6f4"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "popover-anchor-polyfill-1.0.0.tgz",
            "hashes":  {
                "sha1":  "fa7116eaa9e7ef7894f96851f7ac776c15c81377",
                "sha512_sri":  "sha512-YNT8oKiR1SJ7cRjHLqGXVxMxyy4ZuclvalNxOQSd+dCpXZ5/L/AgFrjJuD5+4WQvPl+Ko7B0Y4OfgrTjSCPvdQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/popover-anchor-polyfill/MAL-2026-17517.json"