CVE-2026-83619

xmldom (a pure JavaScript W3C-compliant DOMParser and XMLSerializer module) is vulnerable to a ReDoS (Regular Expression Denial of Service) in versions 0.7.0 through 0.8.15 . The root cause is an unanchored global regex /[ \t\n\r]+$/g in lib/sax.js that trims end-tag names; when an end tag contai...

CVE-2026-83619 xmldom: End-tag Whitespace-Trim Regex ReDoS — quadratic backtracking in the 0.8.x end-tag parser

xmldom is a pure JavaScript W3C standard-based XML DOM Level 2 Core DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression / \t\n\r+$/g. For an end tag containing a long whitespace run...