MAL-2026-6188

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eslint-helper-1/MAL-2026-6188.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6188
Published
2026-06-19T03:59:03Z
Modified
2026-06-19T05:31:48.698316237Z
Summary
Malicious code in eslint-helper-1 (npm)
Details

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

Source: amazon-inspector (cfadd6e70cf70ee03d7aae8bfcaa916d29073c5e09ca614bfcb4538c3efc1832)

Package masquerades as an ESLint helper but contains code in index.js that decodes base64 blobs through Buffer.from(..., 'base64').toString() and pipes the resulting strings into execSync('bash...') and execSync('zsh...'). This is the canonical obfuscated-shell-dropper shape: hidden payload bytes are reconstituted at runtime and handed to a shell interpreter, giving the author arbitrary command execution on the installer's machine. The name (eslint-helper-1) and lack of any legitimate ESLint integration are consistent with a typosquat / brand-impersonation lure for a credential-stealing or remote-execution payload.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "cfadd6e70cf70ee03d7aae8bfcaa916d29073c5e09ca614bfcb4538c3efc1832",
            "source": "amazon-inspector",
            "modified_time": "2026-06-19T03:59:03Z",
            "versions": [
                "5.0.4"
            ],
            "id": "IN-MAL-2026-007043",
            "import_time": "2026-06-19T05:16:48.362267462Z"
        }
    ]
}
References
Credits

Affected packages

npm / eslint-helper-1

Package

Name
eslint-helper-1
View open source insights on deps.dev
Purl
pkg:npm/eslint-helper-1

Affected ranges

Affected versions

5.*
5.0.4

Database specific

cwes 
[
    {
        "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/eslint-helper-1/MAL-2026-6188.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "417f814a3838ff76700a5fec27c2a50ff4e8785e96556669448a5d252ac5fed7",
            "tlsh": "4fe166a901162126d6f1e7f8eb560016f7ded2137202c742b6ac4ac92f77528e1d2fec",
            "path": "index.js"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-zhGVI/O1ntBOjasIyxNGf5651zIrH+hwNlheD1JtDlRf6xfTf66jjpfE5bHGTDyEPdj26NOM4/w3kjc7wsmhcw==",
                "sha1": "3778147696b0f533b0fd61d26d1eefce31f0d212"
            },
            "filename": "eslint-helper-1-5.0.4.tgz"
        }
    ]
}