MAL-2026-17176

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-moonlet-helpers/MAL-2026-17176.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17176
Published
2026-09-25T02:40:24Z
Modified
2026-09-25T03:00:06Z
Summary
Malicious code in n8n-nodes-moonlet-helpers (npm)
Details

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

Source: amazon-inspector (937f80200481fb9bef57f6dc72e7ad55bee68982b1cb7a86b909c86c46e8b2ec)

Package presents itself as n8n helper nodes but ships an empty stub index.js (module.exports = {}) and no functional node modules. On npm install, postinstall.js runs automatically: it performs an HTTPS GET to https://mkicom.com/.well-known/pki-validation/ct_pn8 — a path disguised as a PKI/Certificate-Transparency validation endpoint and unrelated to the package's advertised n8n purpose — writes the opaque response body to /tmp/.np, chmods it 0755, and executes it via spawn('/bin/sh', ['-c', 'setsid /tmp/.np... &'], {detached: true}) so the process survives npm exit. There is no hash, signature, or version pinning on the downloaded bytes. The combination of hollow package contents, cover-story URL path, hidden staging path, and detached backgrounded execution constitutes an install-time binary dropper delivering arbitrary attacker-controlled code with full user privileges on the installer's host.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020541",
            "import_time":  "2026-09-25T02:45:28.833479647Z",
            "modified_time":  "2026-09-25T02:40:24Z",
            "sha256":  "937f80200481fb9bef57f6dc72e7ad55bee68982b1cb7a86b909c86c46e8b2ec",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-020542",
            "import_time":  "2026-09-25T02:45:28.862114203Z",
            "modified_time":  "2026-09-25T02:40:31Z",
            "sha256":  "fe3c30c7100c080a1f0c265a5c4f51f93b5c970eda7531a5f7d91c1114bae554",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / n8n-nodes-moonlet-helpers

Package

Name
n8n-nodes-moonlet-helpers
View open source insights on deps.dev
Purl
pkg:npm/n8n-nodes-moonlet-helpers

Affected ranges

Affected versions

1.*
1.0.0
1.0.4

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "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"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "postinstall.js",
            "sha256":  "57ca4cffba58dc9cb3dbf77dfbd201fd9183cfb5cfb738c4f61ab74b2829eb4a",
            "tlsh":  "c10120e751f180106b3240dce063b53fa507f00166429de0f85c85234fc16bd493b5f8"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "n8n-nodes-moonlet-helpers-1.0.0.tgz",
            "hashes":  {
                "sha1":  "a021317979bd87040aaa6a70b65255de3a9bbf0c",
                "sha512_sri":  "sha512-X7dccg2qEkYT5YeFcaYxLL9gNiaeh7lFwJYhm3YXSBWWxNX0f9Oy9fLk9bOLrCcyQmUnFxW5ZfP9rYQgfDTzVA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-moonlet-helpers/MAL-2026-17176.json"