CVE-2026-83609

xmldom (a pure JavaScript W3C XML DOM module) is vulnerable in versions 0.9.0 through 0.9.12 due to a flaw in lib/grammar.js. The shared reg() builder compiles the anchored QName_exact validator with the multiline flag , causing ^ and $ to validate only one line rather than the full name. As a re...

CVE-2026-83609 xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path

xmldom is a pure JavaScript W3C standard-based XML DOM Level 2 Core DOMParser and XMLSerializer module. From 0.9.0 until 0.9.12, the shared reg builder in lib/grammar.js compiles the anchored QNameexact validator with the multiline flag, so ^ and $ validate only one line instead of the complete...