---
cve: "CVE-2026-48748"
severity: "HIGH"
cvss: 7.5
epss: "39%"
vendor: "netty"
kev: false
exploited: false
published: "2026-06-12 14:45:04"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:20:41+02:00"
---

# CVE-2026-48748

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Netty is a network application framework for development of protocol servers and clients. Starting in version 4.2.0.Final and prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches 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)

- a41f7b289ce1d697c50846f3ade3983e22b2ed40 (Commit)
- 75127cab731ee35068d1f0667bffa188bc332f5d (Commit)

## Referenzen

- <https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6>
- <https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d>
- <https://github.com/netty/netty/releases/tag/netty-4.2.15.Final>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48748) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_