MAL-2026-4655

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/qr-code-styling-temp/MAL-2026-4655.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4655
Published
2026-05-19T18:45:27Z
Modified
2026-05-26T06:02:51.402832942Z
Summary
Malicious code in qr-code-styling-temp (npm)
Details

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

Source: amazon-inspector (004a5cc51cc0e38448c56189fb4437ad113eec163f7ae1a7692b88d6aed71182)

The package's install lifecycle script (node index.js) and its main entry both load lib/core.js, which reads os.userInfo().username, os.hostname(), and the current working directory basename and encodes them into a subdomain of oob.sl4x0.xyz, then triggers a dns.resolve4 lookup of samsung.<user>.<host>.<cwd>.<ts>.oob.sl4x0.xyz. This is an out-of-band DNS exfiltration beacon that fires on every npm install and on every require() of the package, leaking installer identity to an attacker-controlled domain. Module names (os, dns, process, userInfo, hostname, resolve4) and the C2 domain are hidden as String.fromCharCode charcode arrays in lib/b02e30.js and lib/6ad264.js, with os and dns loaded via module.constructor._load(...) to evade static require scanners. The package name impersonates the popular qr-code-styling library but ships an unrelated API surface, and the author email research@sl4x0.xyz shares the same domain as the exfiltration host — confirming the typosquat lure and attacker-controlled infrastructure.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "004a5cc51cc0e38448c56189fb4437ad113eec163f7ae1a7692b88d6aed71182",
            "id": "IN-MAL-2026-003240",
            "source": "amazon-inspector",
            "modified_time": "2026-05-19T18:45:27Z",
            "versions": [
                "9.9.10"
            ],
            "import_time": "2026-05-26T05:50:16.384829394Z"
        },
        {
            "sha256": "20b1cb1f8211a6eb0d5b0ec3bb8cf8819cdd1c661c806e838d62f8c157e0e37f",
            "id": "IN-MAL-2026-003248",
            "source": "amazon-inspector",
            "modified_time": "2026-05-19T18:58:10Z",
            "versions": [
                "9.9.11"
            ],
            "import_time": "2026-05-26T05:50:17.416947799Z"
        }
    ]
}
References
Credits

Affected packages

npm / qr-code-styling-temp

Package

Name
qr-code-styling-temp
View open source insights on deps.dev
Purl
pkg:npm/qr-code-styling-temp

Affected ranges

Affected versions

9.*
9.9.10
9.9.11

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/qr-code-styling-temp/MAL-2026-4655.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "tlsh": "d0f02d69b393c48f97e096d0360a53d18559c3c0e7cf8195fb7c4a87904e7d1ca85a55",
            "sha256": "d24415d02b2768deed6613ba41e3837825889459718a582d352a0805d40a321c",
            "path": "lib/core.js"
        },
        {
            "sha256": "1a2311c854ee8851bcbb6c5ec8cad943891f72e184b21bd9716581be36295af0",
            "tlsh": "56e068073303c94fa1c80bfb7d0050e0aa0d8b58a21dc0d6b528678500af447c0c0632",
            "path": "lib/b02e30.js"
        },
        {
            "sha256": "a30d0c5d786712e9c52406ca2a4e8671031aa6e93ee0b4512776bbe3c6cab583",
            "tlsh": "16218b22ce214c233ad969a0ad6d3941b4a70c974e547c0977c2522d8fdf26f12bf61d",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "qr-code-styling-temp-9.9.10.tgz",
            "hashes": {
                "sha1": "07bf549e8950e4005997e20e77f7376de489af54",
                "sha512_sri": "sha512-veeCwOt/VuCzgo8x3TW2v2ZKMlOok62RbOn70hYbJJrmZjtI5EkJIYw9VNcOgY9qqStWgNhMNTWzZ6VMAwSXhg=="
            }
        }
    ]
}