{"cve":"CVE-2026-83613","nvd":{"published":"2026-09-01T15:17:39.583","modified":"2026-09-08T21:11:31.703","status":"Deferred","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":null,"cwes":["CWE-407"],"references":["https://github.com/xmldom/xmldom/commit/2c548f200cfec991cd5846627ef8f03542309213","https://github.com/xmldom/xmldom/commit/cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3","https://github.com/xmldom/xmldom/pull/1071","https://github.com/xmldom/xmldom/pull/1072","https://github.com/xmldom/xmldom/releases/tag/0.8.15"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-83613","score":0.00604,"percentile":0.48897,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8344-3jmq-59r6","url":"https://osv.dev/vulnerability/GHSA-8344-3jmq-59r6","summary":"xmldom: Quadratic-time attribute deduplication","modified":"2026-09-08T21:25:58.513143Z","packages":[{"ecosystem":"npm","name":"@xmldom/xmldom","purl":"pkg:npm/%40xmldom/xmldom","ranges":[">=0.7.0 <0.8.15"],"fixed":["0.8.15"]},{"ecosystem":"npm","name":"@xmldom/xmldom","purl":"pkg:npm/%40xmldom/xmldom","ranges":[">=0.9.0 <0.9.12"],"fixed":["0.9.12"]},{"ecosystem":"npm","name":"xmldom","purl":"pkg:npm/xmldom","ranges":["<=0.6.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}