---
cve: "CVE-2026-83615"
severity: "HIGH"
cvss: 8.7
epss: "0.4%"
vendor: "xmldom"
kev: false
exploited: false
published: "2026-09-01 15:17:39"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T01:33:20+02:00"
---

# CVE-2026-83615

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a (Commit)
- 0af8cf829d8a92bbac612903422c6947f5458f06 (Commit)

## Referenzen

- <https://github.com/xmldom/xmldom/security/advisories/GHSA-965w-775f-mr7g>
- <https://github.com/xmldom/xmldom/pull/1071>
- <https://github.com/xmldom/xmldom/pull/1072>
- <https://github.com/xmldom/xmldom/commit/954370f58c046223faf95ba77efcbc8ce014409d>
- <https://github.com/xmldom/xmldom/commit/dabffe884e864eeecb1f515c716f875e1bc47ec1>
- <https://github.com/xmldom/xmldom/releases/tag/0.8.15>
- <https://github.com/xmldom/xmldom/releases/tag/0.9.12>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-83615) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_