MAL-2026-17307

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fabric-mod-utils/MAL-2026-17307.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17307
Published
2026-09-30T01:26:57Z
Modified
2026-09-30T01:45:10Z
Summary
Malicious code in fabric-mod-utils (npm)
Details

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

Source: amazon-inspector (b3ada8fa4c11f57f6f8bfcf158b33b56d71f6f1433910b981cec70492b2272a9)

The package declares scripts.postinstall = 'node index.js'. On install, index.js performs an HTTPS GET to the hardcoded host fabric-npm.gm-service.xyz at path /p and passes the response body to vm.runInContext, executing whatever code the server returns on the installer's machine. The host and path are stored in short obfuscated variables (_h, _p). The package's stated purpose ('Native asset loader bridge for Fabric mod environments') is contradicted by its shipped contents: lib/renderer.js is an inert stub returning no-op { status: "ok" } shader results and has no relationship to the actual install-time behavior. The mod-utility framing functions as cover for an install-time remote-code loader whose payload is attacker-mutable and unpinned.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020783",
            "import_time":  "2026-09-30T01:36:51.27049627Z",
            "modified_time":  "2026-09-30T01:26:57Z",
            "sha256":  "b3ada8fa4c11f57f6f8bfcf158b33b56d71f6f1433910b981cec70492b2272a9",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / fabric-mod-utils

Package

Name
fabric-mod-utils
View open source insights on deps.dev
Purl
pkg:npm/fabric-mod-utils

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":  "615f67404e631a9c5c2f81442b2b99e615e19d3e7803e4436dfcd3e49f46fbc7",
            "tlsh":  "2ef0dd36bbed6125272054eca4838806c86be2232212f690f69c42586fca53cf1d6798"
        },
        {
            "path":  "package.json",
            "sha256":  "1d8f63500bc105cf989bf26d6993f45718b0e1ebb9a57e013e7b0b4670119414",
            "tlsh":  "bde0c2206a21da2320d8aab46e3a569536204f2b4044fcac22a7115cd2cebb655fb31b"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "fabric-mod-utils-1.0.0.tgz",
            "hashes":  {
                "sha1":  "4112b38907ddf649328e4620f93f9434c1f4af76",
                "sha512_sri":  "sha512-5ICIheYaEQGlvKlCbedZtSeCxT/UQPkdOcbM1/n/nwqv+A5Yd1SYiIm3IOlkTsVIUHmtJ3d1sFQBUgG2Uh0Dkw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fabric-mod-utils/MAL-2026-17307.json"