CVE-2026-83613

Description

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, DOMHandler.startElement in lib/dom-parser.js inserts every parsed attribute through setAttributeNode, while NamedNodeMap.setNamedItem in lib/dom.js calls the linear getNamedItem or getNamedItemNS lookup for each insertion. A well-formed element with many distinct attributes therefore requires quadratic comparisons during DOMParser.parseFromString() and can stall a Node.js event loop before application validation. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

References

https://github.com/xmldom/xmldom/security/advisories/GHSA-8344-3jmq-59r6

https://github.com/xmldom/xmldom/releases/tag/0.9.12

https://github.com/xmldom/xmldom/releases/tag/0.8.15

https://github.com/xmldom/xmldom/pull/1072

https://github.com/xmldom/xmldom/pull/1071

https://github.com/xmldom/xmldom/commit/cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3

https://github.com/xmldom/xmldom/commit/2c548f200cfec991cd5846627ef8f03542309213

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4