---
cve: "CVE-2026-72522"
severity: "MEDIUM"
cvss: 6.2
epss: "0.2%"
vendor: "libexpat project"
kev: false
exploited: false
published: "2026-08-10 03:28:04"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T00:00:46+02:00"
---

# CVE-2026-72522

> 6.2 MEDIUM · 🧪 PoC

## Beschreibung

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| 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)

- 92810461043fce37e70079b37ab1f04490a8f039 (Commit)

## Referenzen

- <https://github.com/libexpat/libexpat/pull/1296>
- <https://bugzilla.mozilla.org/show_bug.cgi?id=2053153>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-72522) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_