{"id":"CVE-2026-83615","summary":"xmldom: Quadratic-memory consumption","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 0.1.5 through 0.6.0, appendElement in lib/sax.js uses _copy to clone the complete currentNSMap for each nested element that declares a new namespace prefix. Keeping every ancestor map live on the parse stack creates quadratic peak namespace-map storage, so a small highly compressible XML document can exhaust the process heap 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-965w-775f-mr7g"],"modified":"2026-09-03T03:48:19.215596374Z","published":"2026-09-01T14:44:05.884Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83615.json","cna_assigner":"GitHub_M"},"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-2026-83615.json"},{"type":"ADVISORY","url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-965w-775f-mr7g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83615"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/954370f58c046223faf95ba77efcbc8ce014409d"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/dabffe884e864eeecb1f515c716f875e1bc47ec1"},{"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":"36d3a1d0f09f2f0fea3d9922113bddcb3dd0e957"},{"last_affected":"c80a161172cc4d8733583bf0cf59abfa589f6d9e"},{"introduced":"c568938641cc1f121cef5b4df80fcfda1e489b6e"},{"fixed":"b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a"},{"introduced":"8c7c7afe89027641aa59c101d20eefedc0f54c6f"},{"fixed":"0af8cf829d8a92bbac612903422c6947f5458f06"}],"database_specific":{"extracted_events":[{"introduced":"0.1.5"},{"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"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83615.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"}]}