---
id: CVE-2018-12120
title: >-
  Node.js: All versions prior to Node.js 6.15.0: Debugger port 5858 listens on
  any interface by default: When the debugger is enabled with `node --debug` or
  `node debug`, it listens to port 5858 on all interfaces by default
summary: >-
  Node.js: All versions prior to Node.js 6.15.0: Debugger port 5858 listens on
  any interface by default: When the debugger is enabled with `node --debug` or
  `node debug`, it listens to port 5858 on all interfaces by default. This may
  allow…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-419
  - CWE-829
vendor: nodejs
product: node.js
affected:
  - 'node.js >= 6.0.0, < 6.15.0'
patched:
  - node.js 6.15.0
published: '2018-11-28'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:16:44.727'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-12120'
references:
  - url: 'http://www.securityfocus.com/bid/106040'
    label: cve-request@iojs.org
  - url: 'https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/'
    label: cve-request@iojs.org
  - url: 'http://www.securityfocus.com/bid/106040'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.04277
epssPercentile: 0.90845
ingestedAt: '2026-10-08T23:16:47.294Z'
---

## Overview

Node.js: All versions prior to Node.js 6.15.0: Debugger port 5858 listens on any interface by default: When the debugger is enabled with `node --debug` or `node debug`, it listens to port 5858 on all interfaces by default. This may allow remote computers to attach to the debug port and evaluate arbitrary JavaScript. The default interface is now localhost. It has always been possible to start the debugger on a specific interface, such as `node --debug=localhost`. The debugger was removed in Node.js 8 and replaced with the inspector, so no versions from 8 and later are vulnerable.

## Affected

- `node.js >= 6.0.0, < 6.15.0`

## Remediation

Upgrade past the affected range:

- `node.js 6.15.0`