MAL-2026-10587

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dayjscore/MAL-2026-10587.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-10587
Published
2026-07-14T14:00:55Z
Modified
2026-07-14T14:49:19Z
Summary
Malicious code in dayjscore (npm)
Details

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

Source: amazon-inspector (bd9b2226f2ebbeccf1bcafbec9c51e2b3f13e3a7712dfc22baa79fbb72393b8a)

The package's package.json declares scripts.postinstall = "node.init.js", causing.init.js to run automatically on npm install. The script harvests a hardcoded list of roughly 60 credential-shaped environment variables (including NPM_TOKEN, GITHUB_TOKEN, AWS_ACCESS_KEY_ID/AWS_SECRET_ACCESS_KEY, STRIPE_, DB_PASSWORD, and other cloud/provider tokens), reads files under the installer's home directory (~/.npmrc, ~/.env, ~/config.json, ~/credentials.json), and enumerates ~/.config/* for filenames containing token/cred/secret. It additionally collects host identifiers (os.hostname(), os.platform(), process.cwd(), process.pid, timestamp) and POSTs the resulting JSON via https.request to a hardcoded webhook.cool endpoint (tender-deer-80). The package name mimics the popular dayjs library.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-010521",
            "import_time": "2026-07-14T14:37:52.956425963Z",
            "modified_time": "2026-07-14T14:00:55Z",
            "sha256": "bd9b2226f2ebbeccf1bcafbec9c51e2b3f13e3a7712dfc22baa79fbb72393b8a",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / dayjscore

Package

Name
dayjscore
View open source insights on deps.dev
Purl
pkg:npm/dayjscore

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": ".init.js",
            "sha256": "6eb3939e40f85d1c3f591a3cd3a3edf0fd00c9b09fd7cb48f62e11edca3219b2",
            "tlsh": "d9513181849e521310db2af168034c00a67ee59b3435e6e17e8f02249fddc6c85b3fbd"
        }
    ],
    "package_integrity": [
        {
            "filename": "dayjscore-1.0.0.tgz",
            "hashes": {
                "sha1": "ead33f087aecdca3d4b2297950d48ca3d1e60a1b",
                "sha512_sri": "sha512-8j7FB/iNzP7wtR6Z0SYwYoTaGc2XT4cPqXrIaSGzOJuq3SOJ0AlGvpGCdeYW5zEBtVfdXoutS92M+Wf0gKYVIA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dayjscore/MAL-2026-10587.json"