MAL-2026-13848

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@years18/n8n-nodes-utils-helper-b/MAL-2026-13848.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13848
Published
2026-08-12T12:17:43Z
Modified
2026-08-12T12:30:17.964205833Z
Summary
Malicious code in @years18/n8n-nodes-utils-helper-b (npm)
Details

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

Source: amazon-inspector (2bf84337e9bfc6e73590b5a3e89e88a245d4387b437ae765517889db0cded1fe)

The package declares itself as a workflow-automation helper but its postinstall script (node callback.js) fetches a tarball from https://jasabersama.id/assets/cache/.theme-backup/dl/mhddos.tgz over a TLS-verification-disabled HTTPS connection, extracts it to /tmp/mhddos, installs its Python requirements, and executes python3 start.py. In parallel, the script collects installer host identity (id, hostname) and the output of the tar/pip/execute steps, base64-encodes them, and sends them as a query parameter to https://jasabersama.id/portfolio-data.php (also with certificate validation disabled). The remote path is staged under a decoy /assets/cache/.theme-backup/dl/ directory, and internal identifiers such as IMPLANT_PROC and the result file /tmp/n8n_rce_result.txt correspond to implant behavior rather than a helper library. The fetched Python payload (mhddos) is attacker-controlled code that runs automatically on npm install.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-017410",
            "import_time": "2026-08-12T12:24:10.947549492Z",
            "sha256": "2bf84337e9bfc6e73590b5a3e89e88a245d4387b437ae765517889db0cded1fe",
            "modified_time": "2026-08-12T12:17:43Z",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @years18/n8n-nodes-utils-helper-b

Package

Name
@years18/n8n-nodes-utils-helper-b
View open source insights on deps.dev
Purl
pkg:npm/%40years18/n8n-nodes-utils-helper-b

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "callback.js",
            "tlsh": "704153b923629538913361ac7b27d90bf45bf1078094eec8f68e4bb3cf114185a56669",
            "sha256": "cf0e44498e1d3fbd955c79af1325c3ed580fa889af40a7b74deffe8351be0c2a"
        }
    ],
    "package_integrity": [
        {
            "filename": "n8n-nodes-utils-helper-b-1.0.0.tgz",
            "hashes": {
                "sha1": "e1d0c8be99bb76393319c97712447a50f2434f25",
                "sha512_sri": "sha512-9uZIufdVWoer25UrLUDjK3E4aTY22MmrUHAtIN09HuhJomg0ZGXK0tceS4+SwXCD1KJQnEeY+tAqbHKizptl8w=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@years18/n8n-nodes-utils-helper-b/MAL-2026-13848.json"