CVE-2026-83619

Описание

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 followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor. DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15.

A flaw was found in xmldom, a JavaScript module used for processing XML documents. A remote attacker could exploit a vulnerability in the XML parser by submitting a specially crafted XML input. This could lead to a Denial of Service (DoS), causing the affected system to become unresponsive by stalling the Node.js event loop. The vulnerability stems from a regular expression that processes end-tags inefficiently, consuming excessive resources.