Answer in brief
CVE-2026-83614 records a High severity (CVSS 8.7) vulnerability in xmldom: Quadratic-time parsing via the malformed-input recovery path — `parseElementStartPart` re-scan and `normalize()` adjacent-text merge. 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 8.7. 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 | >= 0.3.0, <= 0.6.0 | Not reported |
| @xmldom/xmldomgeneric | >= 0.7.0, < 0.8.15 || >= 0.9.0, < 0.9.12 | Not reported |
| xmldomnpm | >=0.3.0,<=0.6.0 | Not reported |
| xmldomnpm | >=0.3.0 | Not reported |
| @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 |
| @xmldom/xmldomnpm | >=0.9.0 <0.9.12 | 0.9.12 |
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 0.3.0 through 0.6.0, two independent quadratic paths can cause denial of service. In lib/sax.js, parseElementStartPart repeatedly rescans a malformed tag name to the next > during single-character recovery; in lib/dom.js, normalize() repeatedly removes and appends adjacent text nodes, causing quadratic reindexing and string rebuilding. The first path is reachable through default DOMParser.parseFromString() processing, while the second is also reachable through a direct normalize() call on a programmatically constructed DOM, and endDocument invokes that normalization after parsing. 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.