xmldom: Quadratic-memory consumption
CVE-2026-83615 is fixed in node-xmldom on 1 platform by DEBIAN-CVE-2026-83615 (version 0.9.12-1), released September 8, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-xmldom · Debian 14 | 0.9.12-1 | DEBIAN-CVE-2026-83615 | Sep 8, 2026 |
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