{"cve":"CVE-2026-83615","nvd":{"published":"2026-09-01T15:17:39.887","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 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.","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-770"],"references":["https://github.com/xmldom/xmldom/commit/954370f58c046223faf95ba77efcbc8ce014409d","https://github.com/xmldom/xmldom/commit/dabffe884e864eeecb1f515c716f875e1bc47ec1","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-2026-83615","score":0.0059,"percentile":0.48218,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-965w-775f-mr7g","url":"https://osv.dev/vulnerability/GHSA-965w-775f-mr7g","summary":"xmldom: Quadratic-memory consumption","modified":"2026-09-08T21:15:04.889305067Z","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":[">=0.1.5 <=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."]}