MAL-2026-4662

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/rendezvous-js/MAL-2026-4662.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4662
Published
2026-05-20T13:17:50Z
Modified
2026-05-26T06:02:53.275566213Z
Summary
Malicious code in rendezvous-js (npm)
Details

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

Source: amazon-inspector (5b4a03eaa6b09e5b9e291dd450f58e49a639c3efd8fa952f5ac48f9aea04aba4)

On npm install (scripts.install runs node index.js) and on require('rendezvous-js'), lib/core.js collects os.userInfo().username, os.hostname(), and the basename of process.cwd(), then issues a DNS A-record lookup for lwrendezvous.<user>.<host>.<cwd>.<timestamp>.oob.sl4x0.xyz. The query encodes installer host identity into the subdomain so it reaches the attacker's authoritative nameserver — a standard DNS-tunnel exfiltration channel that bypasses HTTP egress filtering. The destination domain (oob.sl4x0.xyz), the imported module names (os, dns, process), and method names (userInfo, hostname, cwd, resolve4) are all stored as decimal char-code arrays in lib/b02e30.js and lib/6ad264.js and decoded at runtime via String.fromCharCode solely to hide the channel from review. The README explicitly claims 'No network requests / No file system access', directly contradicting the shipped code. The author email research@sl4x0.xyz matches the exfil domain, and the beacon prefix lwrendezvous plus generic 'Enterprise Tools Team' authorship are consistent with a typosquat/dependency-confusion lure. Installer harm fires both at install time and at require time without consent.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-05-26T05:50:49.505696034Z",
            "versions": [
                "9.9.11"
            ],
            "id": "IN-MAL-2026-003542",
            "sha256": "5b4a03eaa6b09e5b9e291dd450f58e49a639c3efd8fa952f5ac48f9aea04aba4",
            "modified_time": "2026-05-20T13:17:50Z",
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-05-26T05:50:49.617021274Z",
            "versions": [
                "9.9.11"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-003543",
            "modified_time": "2026-05-20T13:17:51Z",
            "sha256": "94439c9366c8f8c3ae7ed2b70305f1ea90efca3e5d162868f3453b7237f7a5c5"
        }
    ]
}
References
Credits

Affected packages

npm / rendezvous-js

Package

Name
rendezvous-js
View open source insights on deps.dev
Purl
pkg:npm/rendezvous-js

Affected ranges

Affected versions

9.*
9.9.11

Database specific

indicators 
{
    "domains": [
        "lwrendezvous.scan.scan2e66d235d0f.rendezvousjs.1779283022.oob.sl4x0.xyz"
    ],
    "evidence_files": [
        {
            "tlsh": "38014929a393c08f97e096d0361a03d18499c380e7ce80a5fa7c4a87904e7d1cac5a96",
            "sha256": "397d1435e7291ed6b02b8627033a110124d250a54290b3a8f9f248573fd6a2d4",
            "path": "lib/core.js"
        },
        {
            "tlsh": "f7e068073313c94fa1c80bf77d0050a4aa5e8f5da12dc0d6b61c678910af443c0c0632",
            "sha256": "b1541861e4113e791bf6eac343421a0a9b4b763be3369d9b443d37fa7632cb3d",
            "path": "lib/b02e30.js"
        },
        {
            "tlsh": "9e216a21ce644d632ac429d4a8a96942f4a3481b4d587c0a73c6913c8fdf2af51ff61d",
            "sha256": "557681b9b585b6ef4e04667979a6b5c7d1fef7600276136dc0ab2fff899a4828",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-G/Q7ITUQ8ri9JlUDcOtYYAyEKzOFdmTU/fVzjy2IDsmi+IieElZQz1kKOuVmfPuJemtluLP6y5QQI7JDiYyT2g==",
                "sha1": "64e7fdd812188ef46c484f02ced46e1efb3206fc"
            },
            "filename": "rendezvous-js-9.9.11.tgz"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/rendezvous-js/MAL-2026-4662.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]