MAL-2026-13436

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@wbnr/frontend-shared/MAL-2026-13436.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13436
Published
2026-08-06T16:19:30Z
Modified
2026-08-06T23:50:03.955031316Z
Summary
Malicious code in @wbnr/frontend-shared (npm)
Details

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

Source: amazon-inspector (6208a0da32b8b7ae795d85ecbf95788b876729db08b0a595ad24f05a02dbbdbe)

The package declares a preinstall lifecycle script (preinstall.js) that automatically runs on npm install. The script reads the installer's OS username (from process.env USER/USERNAME) and hostname (os.hostname()), embeds them into a subdomain of a hardcoded 4otph6fase1x2won0hrfzul2wt2qqge5.oastify.com callback host, and transmits them via both a DNS lookup and an HTTPS GET to that host at path /depconf/. The behavior is consistent with a dependency-confusion probe using Burp Collaborator (oastify.com) infrastructure; installer identifiers (username, internal hostname, timestamp, package name) are disclosed to a third-party callback domain on every install.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-016680",
            "import_time": "2026-08-06T18:09:05.150583525Z",
            "sha256": "6208a0da32b8b7ae795d85ecbf95788b876729db08b0a595ad24f05a02dbbdbe",
            "versions": [
                "99.0.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-06T16:22:04Z"
        },
        {
            "id": "IN-MAL-2026-016675",
            "import_time": "2026-08-06T18:09:04.478112375Z",
            "sha256": "d10e6da61faa186ed684c79707395158b1fd639ebe55ab4b36f13d8f98789fa1",
            "modified_time": "2026-08-06T16:19:30Z",
            "source": "amazon-inspector",
            "versions": [
                "99.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @wbnr/frontend-shared

Package

Name
@wbnr/frontend-shared
View open source insights on deps.dev
Purl
pkg:npm/%40wbnr/frontend-shared

Affected ranges

Affected versions

99.*
99.0.0
99.0.1

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "preinstall.js",
            "tlsh": "fc0123f8b3e5eb310cd013c4b16c2e2f565be3a231ce9892085563c207b3a71c310ba8",
            "sha256": "e54aed4cc27b61f78dd095fb67b92e1dff62bd9508b16f0b56d66357611dbb0d"
        }
    ],
    "package_integrity": [
        {
            "filename": "frontend-shared-99.0.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-ILBG4IsmDmnQjWKchK65cChG/k4uM2p5wY/ytgcVYpzCAluOM9LALSBXa9T+PgprGkmlVKe3D8WGK12lmwXwTw==",
                "sha1": "110a186c4d8b59c46565976372a795ecc1157607"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@wbnr/frontend-shared/MAL-2026-13436.json"