{"id":"CVE-2026-83613","summary":"xmldom: Quadratic-time attribute deduplication","details":"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.","aliases":["GHSA-8344-3jmq-59r6"],"modified":"2026-09-03T03:48:17.111071901Z","published":"2026-09-01T14:38:49.617Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83613.json"},"references":[{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.8.15"},{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.9.12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83613.json"},{"type":"ADVISORY","url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-8344-3jmq-59r6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83613"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/2c548f200cfec991cd5846627ef8f03542309213"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1071"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1072"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xmldom/xmldom","events":[{"introduced":"0"},{"introduced":"8c7c7afe89027641aa59c101d20eefedc0f54c6f"},{"introduced":"c568938641cc1f121cef5b4df80fcfda1e489b6e"},{"fixed":"0af8cf829d8a92bbac612903422c6947f5458f06"},{"fixed":"b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a"},{"fixed":"2c548f200cfec991cd5846627ef8f03542309213"},{"fixed":"cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.6.0"},{"introduced":"0.9.0"},{"fixed":"0.9.12"},{"introduced":"0.7.0"},{"fixed":"0.8.15"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["0.8.14","0.9.11","0.8.13","0.9.10","0.9.9","0.8.12","0.8.11","0.8.10","0.9.8","0.9.7","0.9.6","0.9.5","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0","0.8.9","0.8.8","0.8.7","0.8.6","0.8.5","0.8.4","0.8.3","0.8.2","0.8.1","0.8.0","0.7.3","0.7.2","0.7.1","0.7.0+scoped","v0.7.0","0.7.0+unscoped","0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83613.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}