Malicious code in fabric-mod-utils (npm)
--- _-= 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.
MAL-2026-17307
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:MAL-2026-17307
fabric-mod-utils
Source reference: /affected/0/package/name
- Affected versions
- 1.0.0
Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"package": {
"name": "fabric-mod-utils",
"purl": "pkg:npm/fabric-mod-utils",
"ecosystem": "npm"
},
"versions": [
"1.0.0"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
}
],
"source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fabric-mod-utils/MAL-2026-17307.json",
"indicators": {
"evidence_files": [
{
"path": "index.js",
"tlsh": "2ef0dd36bbed6125272054eca4838806c86be2232212f690f69c42586fca53cf1d6798",
"sha256": "615f67404e631a9c5c2f81442b2b99e615e19d3e7803e4436dfcd3e49f46fbc7"
},
{
"path": "package.json",
"tlsh": "bde0c2206a21da2320d8aab46e3a569536204f2b4044fcac22a7115cd2cebb655fb31b",
"sha256": "1d8f63500bc105cf989bf26d6993f45718b0e1ebb9a57e013e7b0b4670119414"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "4112b38907ddf649328e4620f93f9434c1f4af76",
"sha512_sri": "sha512-5ICIheYaEQGlvKlCbedZtSeCxT/UQPkdOcbM1/n/nwqv+A5Yd1SYiIm3IOlkTsVIUHmtJ3d1sFQBUgG2Uh0Dkw=="
},
"filename": "fabric-mod-utils-1.0.0.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #33429 · Revision 1
- Added to Heist Feed
- Publisher date