MAL-2026-16478

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/event-hunter/MAL-2026-16478.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16478
Published
2026-09-23T14:14:28Z
Modified
2026-09-23T14:30:05Z
Summary
Malicious code in event-hunter (npm)
Details

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

Source: amazon-inspector (f94b74862f327effaa43c1d01c4fd769626f73214d0706b80fef8b8a395cc3e8)

On npm install, the declared postinstall hook runs node index.js, which reads os.hostname() and a timestamp, base64-encodes the JSON payload, and issues an HTTPS GET to https://estimator-nemeses-unwatched.ngrok-free.dev/canary?d=<base64>. The destination is a hardcoded ngrok tunnel unrelated to any registry or vendor infrastructure, and the beacon fires automatically without any caller action or opt-in. The package's own metadata describes it as a Dependency Confusion to RCE proof-of-concept, and the install-time callback carries the installer's internal hostname to an external third party.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020494",
            "import_time":  "2026-09-23T14:19:31.953567157Z",
            "modified_time":  "2026-09-23T14:14:28Z",
            "sha256":  "f94b74862f327effaa43c1d01c4fd769626f73214d0706b80fef8b8a395cc3e8",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / event-hunter

Package

Name
event-hunter
View open source insights on deps.dev
Purl
pkg:npm/event-hunter

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":  "index.js",
            "sha256":  "6ff2d04134b8ce45ad5086c9818ff39def86396d581dbef1542a7a957209406d",
            "tlsh":  "9ce0c0f022e0d1a01d3037c0c252ac1fd16bf16538a552a1b7ae01d4ca4243299f3e9c"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "event-hunter-1.0.0.tgz",
            "hashes":  {
                "sha1":  "83ca86d9e43cf1dc8bcdad3be7dce43ec7dcff25",
                "sha512_sri":  "sha512-fOARMhsP9kCI1GjXgZPEGJg194NiSSSqzElIlKRg8RRJ6XxSdU6JLdQaUKNWradPM7YEveEAtYg8yLOTplYRcg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/event-hunter/MAL-2026-16478.json"