MAL-2026-12389

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/github-app-sts-action/MAL-2026-12389.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12389
Published
2026-08-05T12:48:10Z
Modified
2026-08-05T13:35:30.481073324Z
Summary
Malicious code in github-app-sts-action (npm)
Details

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

Source: amazon-inspector (9434f2e4ac17da4d2b9dff0c36ed8b3c5cc3f76882b9898b768e78ba982bbac2)

The package declares a preinstall lifecycle hook that runs index.js on npm install. index.js collects host identifiers and system files (os.hostname(), os.userInfo(), home directory, DNS servers, /etc/passwd, /etc/hosts, and package.json contents) and POSTs them via HTTPS to the hardcoded subdomain lncqub6t1loht8b887c8hvcjva13ptdi.oastify.com — a Burp Collaborator out-of-band interaction host used for reconnaissance. There is no advertised functional purpose in the package that would justify this data collection; the code path exists solely to transmit installer host and credential-adjacent file contents to an attacker-controlled endpoint.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "9434f2e4ac17da4d2b9dff0c36ed8b3c5cc3f76882b9898b768e78ba982bbac2",
            "source": "amazon-inspector",
            "versions": [
                "1.0.1"
            ],
            "import_time": "2026-08-05T13:08:44.917654601Z",
            "modified_time": "2026-08-05T12:48:10Z",
            "id": "IN-MAL-2026-014767"
        }
    ]
}
References
Credits

Affected packages

npm / github-app-sts-action

Package

Name
github-app-sts-action
View open source insights on deps.dev
Purl
pkg:npm/github-app-sts-action

Affected ranges

Affected versions

1.*
1.0.1

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "316058dc047e749d8f1bcf4277801a787728a479",
                "sha512_sri": "sha512-GDgjp0SV38Vx/uAa0stljkoeeYm+/vxL0hLCFxwamAP+jMX95j2r52rM8QzdtaVWTstEMH+BEAzWH1VVYfl9rw=="
            },
            "filename": "github-app-sts-action-1.0.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "ff4f133f007e6cae37f1c52b1844c7c0f79e1dea29d22cab360ba9372538f26e",
            "tlsh": "d541259592c917330dd150c0660c70813359f9777159e89077cf42969f869f8b7326f3"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/github-app-sts-action/MAL-2026-12389.json"