CVE-2018-12123: Node.js

Medium severity, CVSS 4.3. EPSS: 4.1% chance of exploitation in the next 30 days.

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Hostname spoofing in URL parser for javascript protocol: If a Node.js application is using url.parse() to determine the URL hostname, that hostname can be spoofed by using a mixed case "javascript:" (e.g. "javAscript:") protocol (other protocols are not affected). If security decisions are made about the URL based on the hostname, they may be incorrect.

Affected products

• Node.js Node.js: from 6.0.0, before 6.15.0 (fixed in 6.15.0); from 8.0.0, before 8.14.0 (fixed in 8.14.0); from 10.0.0, before 10.14.0 (fixed in 10.14.0); from 11.0.0, before 11.3.0 (fixed in 11.3.0)

Published 2018-11-28. Last modified 2026-10-08.