MAL-2026-16053

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/file-type-detector/MAL-2026-16053.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16053
Published
2026-09-09T00:27:12Z
Modified
2026-09-09T01:00:05Z
Summary
Malicious code in file-type-detector (npm)
Details

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

Source: amazon-inspector (04917bd7fc156dcb9793cb1f1d06ed0f2d0cb1b3aa4b04431dea54ed71f6be72)

A clone of file-type-checker with one function added: isSign(name, moduleName, offset) in dist/validation/image.js reads public/${name}.png from the working directory, splits the buffer at -offset, and writes the trailing payload to../../../{moduleName}/log - a sibling package under node_modules - then returns isPNG() so the caller sees a plausible boolean. It is undocumented, reachable only via an __exportStar wildcard so it is never named in dist/index.js, and fails silently on try/catch.

Drop stage of a three-package chain: file-type-detector writes the payload, gloggo (1.1.2-1.1.4) executes it via require('./log'), and sonmors (typosquat of sonner) triggers the chain by requiring gloggo. gloggo shares the npm publisher log-developer and was published five minutes apart on 2026-08-27. No install hooks; execution occurs on require().

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-019729",
            "import_time": "2026-09-09T00:47:58.112210798Z",
            "modified_time": "2026-09-09T00:27:12Z",
            "sha256": "04917bd7fc156dcb9793cb1f1d06ed0f2d0cb1b3aa4b04431dea54ed71f6be72",
            "source": "amazon-inspector",
            "versions": [
                "1.1.0"
            ]
        },
        {
            "id": "IN-MAL-2026-019730",
            "import_time": "2026-09-09T00:47:58.190429304Z",
            "modified_time": "2026-09-09T00:27:22Z",
            "sha256": "71bc73a30f67553cd6a23058191a0e93333a056cbcb85896fbfc87b2e3a4e477",
            "source": "amazon-inspector",
            "versions": [
                "1.1.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / file-type-detector

Package

Name
file-type-detector
View open source insights on deps.dev
Purl
pkg:npm/file-type-detector

Affected ranges

Affected versions

1.*
1.1.0
1.1.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "file-type-detector-1.1.0.tgz",
            "hashes": {
                "sha1": "c3452c877f280788620ba728592d5dac71c2958d",
                "sha512_sri": "sha512-xrefg9CLEpfg+lb5YVdyFHlsV/ZF8Xrt+MsYSAkj38bJmbZ28a3ZgBP0ETKAIs6AQOMgqGp2WHIPpwhLGjapAw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/file-type-detector/MAL-2026-16053.json"