MAL-2026-14156

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typscript-cli/MAL-2026-14156.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14156
Published
2026-08-18T23:21:27Z
Modified
2026-08-18T23:45:11.528417846Z
Summary
Malicious code in typscript-cli (npm)
Details

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

Source: amazon-inspector (1425e6f0bb2305eeddecaab5403e09ead0e8f60b9b1f817581a343cb5a3dd062)

typscript-cli is a typosquat of 'typescript' (index.js exports an empty object; no library functionality). Its scripts/postinstall.js is the only functional code and executes on npm install. It XOR-decodes (key 'stf2026') four embedded numeric arrays to reconstruct a download URL and a PowerShell 'bridge' command, downloads a Windows executable to %TEMP%\main.exe, and spawns it detached with windowsHide:true. On WSL/Linux hosts it uses child_process.exec with the XOR-decoded PowerShell bridge command to drop and run the same payload on the Windows side. The same postinstall also POSTs a platform label to a hardcoded bare-IP endpoint 193.70.34.101:20099/vote over plain HTTP, with the host assembled from a split array ['193','70','34','101'].join('.') to evade literal-string scanning. There is no publisher-matched destination, no version pinning, and no integrity check on the fetched binary.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-18T23:41:22.637759699Z",
            "sha256": "1425e6f0bb2305eeddecaab5403e09ead0e8f60b9b1f817581a343cb5a3dd062",
            "modified_time": "2026-08-18T23:21:27Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-018193",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / typscript-cli

Package

Name
typscript-cli
View open source insights on deps.dev
Purl
pkg:npm/typscript-cli

Affected ranges

Affected versions

1.*
1.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typscript-cli/MAL-2026-14156.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "c4f525aedc0047df61e13d911b0c067613095842b3d7028d6d509005ccdddae5",
            "path": "scripts/postinstall.js",
            "tlsh": "40d13fca1ef590348747f96884cf9d13b2a6c207320e4a65ff8f42107f5793c85a69e9"
        },
        {
            "sha256": "22c47b85234d6c098e28f65272da54d6cef0a6f76f1e26c51ee96bd9c1c532c4",
            "path": "package.json",
            "tlsh": "dad012104d32da3338c4aba50a33c109a6614d6f2044f81837e7545883de7b75dfe71e"
        }
    ],
    "package_integrity": [
        {
            "filename": "typscript-cli-1.0.0.tgz",
            "hashes": {
                "sha1": "ceb9523050818fe5910ebad3ff229da42ff2be19",
                "sha512_sri": "sha512-C9zFcwBrVaF4bbkZGKU5UOpBBgiJLbfvi35BAh5zrUs2mkdiSbs4MOc77fXa90oi7uADum9VhP0F4p0ts5VUeA=="
            }
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]