---
cve: "CVE-2026-83616"
severity: "HIGH"
cvss: 8.7
epss: "35%"
vendor: "xmldom"
kev: false
exploited: false
published: "2026-09-01 15:17:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T00:34:43+02:00"
---

# CVE-2026-83616

> 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 version 0.6.0 and earlier, Document.createProcessingInstruction(target, data) in lib/dom.js accepts an unvalidated target, while the requireWellFormed: true serializer checks only for a colon and the reserved case-insensitive xml name on 0.9.x and performs no target check on 0.8.x. Because serialization emits , a target containing >, ?, whitespace, or another invalid XML-name character can break the processing-instruction boundary and inject XML structure. 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:H/VA:N/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-c7q8-3ch8-vqpv>
- <https://github.com/xmldom/xmldom/pull/1071>
- <https://github.com/xmldom/xmldom/pull/1072>
- <https://github.com/xmldom/xmldom/commit/1cde3e31a07c41c87cfd368d6946aa477f16b4f9>
- <https://github.com/xmldom/xmldom/commit/3b694872bcb5c7e3cbadba961a4be2488750ce5b>
- <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-2026-83616) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_