MAL-2026-16162

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-sysdiag2/MAL-2026-16162.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16162
Published
2026-09-14T22:01:42Z
Modified
2026-09-15T16:31:19Z
Summary
Malicious code in n8n-nodes-sysdiag2 (npm)
Details

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

Source: amazon-inspector (7cde3a20bc24f39c8a55a9f700f50c39dd42cbbab51c57ddf9fbbb54307ee7a8)

The package advertises itself as an n8n community node for system diagnostics, but the shipped node module (dist/SysDiag.node.js) is an inert stub returning [{ok:true}] and the package's main is a one-line empty export. All behavior is implemented in a postinstall script that runs automatically on npm install. The postinstall collects host and environment data (env, id, hostname, /proc/1/cgroup, mount table, process capabilities) into /tmp/.be and posts it via wget --post-file to http://121.127.33.228:8443/env2 over plain HTTP. It also downloads http://121.127.33.228:8444/mn8n2 to /tmp/.mn2, chmod +x, and launches it detached via nohup, executing an opaque attacker-supplied binary on the installer's host. In parallel, it spawns a detached loop that connects nc to 121.127.33.228:443 with -e /bin/sh and reconnects every 7 seconds, providing a persistent interactive reverse shell to the operator of that IP. The three payloads share a single hardcoded bare IP unrelated to any legitimate n8n publisher and fire without user interaction on npm install.

Source: ossf-package-analysis (b77e4f7678fc2bc58ccaf452ce0a7ade1c3fc98c18b0af60350fd6c37343a990)

The OpenSSF Package Analysis project identified 'n8n-nodes-sysdiag2' @ 2.0.0 (npm) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.
Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-09-14T22:16:57.958317554Z",
            "modified_time": "2026-09-14T22:01:42Z",
            "sha256": "b77e4f7678fc2bc58ccaf452ce0a7ade1c3fc98c18b0af60350fd6c37343a990",
            "source": "ossf-package-analysis",
            "versions": [
                "2.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-020051",
            "import_time": "2026-09-15T16:19:14.359779131Z",
            "modified_time": "2026-09-15T15:53:27Z",
            "sha256": "7cde3a20bc24f39c8a55a9f700f50c39dd42cbbab51c57ddf9fbbb54307ee7a8",
            "source": "amazon-inspector",
            "versions": [
                "2.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / n8n-nodes-sysdiag2

Package

Name
n8n-nodes-sysdiag2
View open source insights on deps.dev
Purl
pkg:npm/n8n-nodes-sysdiag2

Affected ranges

Affected versions

2.*
2.0.0

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": "020693305bbdc27a95f650e82eab4ff0ae9f5e619fa4a2bdbd653eaecaadabd9",
            "tlsh": "1601abf8feb48820319e85b5360d80a58d83ca7b09566e9540c78ef9260d68db21e9f1"
        },
        {
            "path": "package.json",
            "sha256": "aaae4b5f2284adb5febe9cf4f6acaec20667148449fc59020deb4538c684a23b",
            "tlsh": "eee026248c719b7720cc1a696c9bc145aa250dab8598fc28b2df00884b692755d7fb49"
        }
    ],
    "package_integrity": [
        {
            "filename": "n8n-nodes-sysdiag2-2.0.0.tgz",
            "hashes": {
                "sha1": "2a73ad4fb095b0a04a8201269566a5c3e56ac1b1",
                "sha512_sri": "sha512-auAcDW1upwP9JRmVWvqhqkF/lbQlFi21klectGw27JVoKfLCu4ZNrx/LLSrRIoflpdH9+O0krNaGRxyuhtfv9g=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/n8n-nodes-sysdiag2/MAL-2026-16162.json"