{"id":"CVE-2026-83614","summary":"xmldom: Quadratic-time parsing via the malformed-input recovery path — `parseElementStartPart` re-scan and `normalize()` adjacent-text merge","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 versions 0.3.0 through 0.6.0, two independent quadratic paths can cause denial of service. In lib/sax.js, parseElementStartPart repeatedly rescans a malformed tag name to the next \u003e during single-character recovery; in lib/dom.js, normalize() repeatedly removes and appends adjacent text nodes, causing quadratic reindexing and string rebuilding. The first path is reachable through default DOMParser.parseFromString() processing, while the second is also reachable through a direct normalize() call on a programmatically constructed DOM, and endDocument invokes that normalization after parsing. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.","aliases":["GHSA-93r5-fhx6-vmg9"],"modified":"2026-09-03T03:48:17.067915921Z","published":"2026-09-01T14:41:42.582Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400","CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83614.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-2026-83614.json"},{"type":"ADVISORY","url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-93r5-fhx6-vmg9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83614"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/0748720b620555f8c222782dcab575cf0cf403b4"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/f40ccb861eee0acbf5ee4feb9a34932e87b329c9"},{"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":"69d754508a910919ddc108b47d18327f96a079f2"},{"last_affected":"c80a161172cc4d8733583bf0cf59abfa589f6d9e"},{"introduced":"c568938641cc1f121cef5b4df80fcfda1e489b6e"},{"fixed":"b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a"},{"introduced":"8c7c7afe89027641aa59c101d20eefedc0f54c6f"},{"fixed":"0af8cf829d8a92bbac612903422c6947f5458f06"}],"database_specific":{"extracted_events":[{"introduced":"0.3.0"},{"last_affected":"0.6.0"},{"introduced":"0.7.0"},{"fixed":"0.8.15"},{"introduced":"0.9.0"},{"fixed":"0.9.12"}],"source":"AFFECTED_FIELD"}}],"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","0.6.0","0.5.0","0.4.0","0.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83614.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"}]}