---
cve: "CVE-2026-83619"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "xmldom"
kev: false
exploited: false
published: "2026-09-01 15:17:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T09:28:31+02:00"
---

# CVE-2026-83619

> 8.7 HIGH · 🧪 PoC

## Beschreibung

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression /[ \t\n\r]+$/g. For an end tag containing a long whitespace run followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor. DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15.

## 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)

- 3abb0934f5a8a84d83a1f9cde0f2bd04c08b2a09 (Commit)
- b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a (Commit)

## Referenzen

- <https://github.com/xmldom/xmldom/security/advisories/GHSA-x4fp-j954-r2f4>
- <https://github.com/xmldom/xmldom/pull/1072>
- <https://github.com/xmldom/xmldom/commit/3abb0934f5a8a84d83a1f9cde0f2bd04c08b2a09>
- <https://github.com/xmldom/xmldom/releases/tag/0.8.15>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-83619) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_