{"id":"CVE-2026-83615","title":"xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module","summary":"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 _c…","severity":"high","cwe":["CWE-770"],"vendor":"xmldom","product":"@xmldom/xmldom","affected":["@xmldom/xmldom >= 0.7.0, <= 0.8.14","@xmldom/xmldom >= 0.9.0, <= 0.9.11","xmldom >= 0.1.5, <= 0.6.0"],"patched":["@xmldom/xmldom 0.8.15","@xmldom/xmldom 0.9.12"],"published":"2026-09-01","updated":"2026-09-08","sourceUpdated":"2026-09-08T21:11:31.703","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83615","references":[{"url":"https://github.com/xmldom/xmldom/commit/954370f58c046223faf95ba77efcbc8ce014409d","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/commit/dabffe884e864eeecb1f515c716f875e1bc47ec1","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/pull/1071","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/pull/1072","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/releases/tag/0.8.15","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/releases/tag/0.9.12","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-965w-775f-mr7g","label":"security-advisories@github.com"},{"url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-965w-775f-mr7g","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83615"},{"url":"https://github.com/advisories/GHSA-965w-775f-mr7g"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83615.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-83615"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526843"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-83615"},{"url":"https://access.redhat.com/errata/RHSA-2026:69248"}],"tags":["nvd","ghsa","npm","csaf","vex","red-hat"],"aliases":["GHSA-965w-775f-mr7g"],"ecosystem":"npm","epss":0.0059,"epssPercentile":0.45851,"ingestedAt":"2026-09-08T21:11:12.321Z","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","slug":"CVE-2026-83615","body":"## Overview\n\nxmldom 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-83615)\n\nAffected packages:\n\n- `@xmldom/xmldom >= 0.7.0, <= 0.8.14`\n- `@xmldom/xmldom >= 0.9.0, <= 0.9.11`\n- `xmldom >= 0.1.5, <= 0.6.0`\n\nPatched in:\n\n- `@xmldom/xmldom 0.8.15`\n- `@xmldom/xmldom 0.9.12`\n\nSource: https://github.com/advisories/GHSA-965w-775f-mr7g\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Build of Podman Desktop, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Fuse 7, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Build of Podman Desktop, Red Hat Fuse 7, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83615.json)\n- **RHSA-2026:69248** · Red Hat · fixed in: Red Hat Developer Hub 1.9 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69248)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206404,"id":"CVE-2026-83615","ts":1789663224827,"field":"cvss","old":null,"new":"7.5"}]}