Answer in brief
CVE-2026-83615 records a High severity (CVSS 0.0) vulnerability in xmldom: Quadratic-memory consumption. The current sources do not mark it as known exploited. The current feed maps @xmldom/xmldom (generic), xmldom/xmldom (generic), xmldom (npm), xmldom (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 0.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps @xmldom/xmldom (generic), xmldom/xmldom (generic), xmldom (npm), xmldom (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| @xmldom/xmldomgeneric | >= 0.7.0, < 0.8.15 || >= 0.9.0, < 0.9.12 | Not reported |
| xmldom/xmldomgeneric | >= 0.1.5, <= 0.6.0 | Not reported |
| xmldomnpm | >=0.1.5,<=0.6.0 | Not reported |
| xmldomnpm | >=0.1.5 | Not reported |
| @xmldom/xmldomnpm | >=0.9.0 <0.9.12 | 0.9.12 |
| @xmldom/xmldomnpm | >=0.7.0,<=0.8.14 | 0.8.15 |
| @xmldom/xmldomnpm | >=0.9.0,<=0.9.11 | 0.9.12 |
| @xmldom/xmldomnpm | >=0.7.0 <0.8.15 | 0.8.15 |
Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 1, 2026
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.
Quoted source text, attributed separately from HOL analysis.