MAL-2026-16339

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pf25133/MAL-2026-16339.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16339
Published
2026-09-21T03:32:43Z
Modified
2026-09-21T04:00:07Z
Summary
Malicious code in pf25133 (npm)
Details

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

Source: amazon-inspector (504c3f95c937a05e14c220c767a0e18f4cada866ee5eebad0749457232ace73b)

The package's declared main module index.js is an IIFE that reads document.cookie, fetches a hardcoded list of application paths, extracts flag-shaped patterns from the responses, and POSTs the aggregated data as JSON to a hardcoded webhook.site collector URL (https://webhook.site/c4e39647-bfb8-47ef-b6d4-a112aacc6cd1). The behavior is unconditional on load and the destination is not configurable. webhook.site is a generic anonymous request-bin service unrelated to any legitimate first-party endpoint, and the package ships no functionality other than this collection payload.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-020243",
            "import_time": "2026-09-21T03:46:39.253563921Z",
            "modified_time": "2026-09-21T03:32:43Z",
            "sha256": "504c3f95c937a05e14c220c767a0e18f4cada866ee5eebad0749457232ace73b",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / pf25133

Package

Name
pf25133
View open source insights on deps.dev
Purl
pkg:npm/pf25133

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": "0d562fbe1e816fb21df7acb49b0f5d293045219699ab0d0afc92e66545e68ae6",
            "tlsh": "99f0dc222e7d102c0a80bacf213bb3b0dc10d815b893cdd483980f3e5b060da58a1294"
        }
    ],
    "package_integrity": [
        {
            "filename": "pf25133-1.0.0.tgz",
            "hashes": {
                "sha1": "ca711fc5033de59190fb6242e4841c90d30f6c84",
                "sha512_sri": "sha512-XJG0w20lV5ePvlxW+vULkH4I7h8TAIsI57ftq8rei3YIcEYYUu4BUBDjTN3FwktqApPxk2zbbWx6r9UdWC266w=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pf25133/MAL-2026-16339.json"