CVE-2026-42579

Published May 13, 2026

Last updated 4 days ago

Overview

Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Source
security-advisories@github.com
NVD status
Modified
Products
netty

Risk scores

CVSS 3.1

Type
Primary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-20
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CWE-1286

Social media

Hype score
Not currently trending

Configurations