---
cve: "CVE-2026-25128"
severity: "HIGH"
cvss: 7.5
epss: "0.6%"
vendor: "NaturalIntelligence"
kev: false
exploited: false
published: "2026-01-30 16:16:14"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T05:30:30+02:00"
---

# CVE-2026-25128

> 7.5 HIGH · 🧪 PoC

## Beschreibung

fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In versions 5.0.9 through 5.3.3, a RangeError vulnerability exists in the numeric entity processing of fast-xml-parser when parsing XML with out-of-range entity code points (e.g., `�` or `�`). This causes the parser to throw an uncaught exception, crashing any application that processes untrusted XML input. Version 5.3.4 fixes the issue.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 753e770f69d0f30c95b0287f7b8c57e4a93bbc12 (Commit)
- 4e387f61c4a5cef792f6a2f42467013290bf95dc (Commit)

## Referenzen

- <https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-37qj-frw5-hhjh>
- <https://github.com/NaturalIntelligence/fast-xml-parser/commit/4e387f61c4a5cef792f6a2f42467013290bf95dc>
- <https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25128) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_