MAL-2026-17765

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@s4yhiitestpoc/r3-https/MAL-2026-17765.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17765
Published
2026-10-11T13:58:31Z
Modified
2026-10-11T14:30:08Z
Summary
Malicious code in @s4yhiitestpoc/r3-https (npm)
Details

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

Source: amazon-inspector (b2638f8970897121676d5dc3ed7c002ab9d9ccc3e400283e165297a95e3c1423)

On npm install, postinstall.js automatically collects host identity (hostname, username, uid/gid, homedir, platform, release), enumerates network interfaces (addresses, MACs, CIDRs), reads DNS servers and internal reverse-DNS names, captures npm/CI environment markers and container/runtime indicators, and walks up to eight parent directories to locate the consuming project's package.json and extract its name, version, declaring dependency field, and declared version range. The collected data is POSTed over HTTPS to the hardcoded endpoint collector.oob.s4yhii.com at path /_npm-poc/beacon, and a parallel DNS lookup to a labeled subdomain under *.oob.s4yhii.com is issued as an out-of-band beacon. The consumer manifest harvesting discloses the installer's private project identity and internal package naming to a third-party host and is the characteristic reconnaissance signal of a dependency-confusion targeting pipeline. The endpoint is not caller-configurable and there is no opt-out.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-021431",
            "import_time": "2026-10-11T14:18:05.039301185Z",
            "modified_time": "2026-10-11T13:58:31Z",
            "sha256": "b2638f8970897121676d5dc3ed7c002ab9d9ccc3e400283e165297a95e3c1423",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @s4yhiitestpoc/r3-https

Package

Name
@s4yhiitestpoc/r3-https
View open source insights on deps.dev
Purl
pkg:npm/%40s4yhiitestpoc/r3-https

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": "postinstall.js",
            "sha256": "cd0d3b55a0161d658c6efcdf4bc172c2a5eccf86e67b380a801662f35fa552fb",
            "tlsh": "aae1f86a05fe113222623af4694b50156776d1633504fbf4b9dd8280afcf0ba42bb7ed"
        }
    ],
    "package_integrity": [
        {
            "filename": "r3-https-1.0.0.tgz",
            "hashes": {
                "sha1": "a8c089e4e2420b847c2eda403438548f3628df51",
                "sha512_sri": "sha512-8eSPg8kwnyi7318K28Gv5HqSHeAz3faWIDW997zmoMmNeUAxcrUOzIAh0x5WB/ljIublvzYqLqhMPnPaxlyCoQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@s4yhiitestpoc/r3-https/MAL-2026-17765.json"