MAL-2026-12226

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/time-webkit-tag/MAL-2026-12226.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12226
Published
2026-08-05T09:16:23Z
Modified
2026-08-05T10:06:33.582679075Z
Summary
Malicious code in time-webkit-tag (npm)
Details

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

Source: amazon-inspector (4da59763ac0349051b13656079486ab8c8c08971ff18c5efa84fbf8f5ce022a0)

On require of the package, index.js loads init.js which unconditionally invokes start(). start() selects a platform-specific asset path, assembles CDN hostnames from split string arrays (oob-worker.cf101-adf.workers.dev family, with a *.dl.well1.site DNS-TXT chunked-transfer fallback), fetches an opaque binary over HTTPS, writes it to /var/tmp or %TEMP% under a hidden dot-file or masquerading name (e.g..cache<rand>, dotnetdiag<rand>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe with.unref(). No hash or signature verification is performed and the destination hosts are assembled at runtime to evade static string matching. A second dropper implementation in lib/telemetry.js repeats the same fetch/base64-decode/chmod/spawn chain, with the chmodSync and childprocess identifiers built via string concatenation (fs["chmod"+"Sync"], "child"+"process") under an analytics-SDK cover story. The package is advertised as a webkit tag provider and has no legitimate need for this behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T09:16:23Z",
            "sha256": "4da59763ac0349051b13656079486ab8c8c08971ff18c5efa84fbf8f5ce022a0",
            "import_time": "2026-08-05T09:28:30.968894763Z",
            "id": "IN-MAL-2026-014617",
            "versions": [
                "20.1.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / time-webkit-tag

Package

Name
time-webkit-tag
View open source insights on deps.dev
Purl
pkg:npm/time-webkit-tag

Affected ranges

Affected versions

20.*
20.1.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "time-webkit-tag-20.1.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-SZjaBa1rQgq8KutqfpgUMfCuClU8nqueKblHc4sMi3kv6hmx9oz7kJ9XO7IB6eHyXfWQxQJTXLHHka5Wp4lAfg==",
                "sha1": "ff29f6aa3a18ef03adcc26700bc9f72ab826b5f4"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "f6a1c89616a5701d4b70abe58b178419f65af6633380c2d0f75ca8981f7612483b2efc",
            "sha256": "dbafeba6472b6ac6acb2b03f0993c8194193173697ff6607ab57659683e03c96",
            "path": "_init.js"
        },
        {
            "tlsh": "32835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "12f38f8479e0f7b5e77955d7c4f4b778bec6969a34342244f0f8de53f58d7881",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/time-webkit-tag/MAL-2026-12226.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]