CVE-2026-45674: netty-resolver-dns: Netty: Information disclosure and data manipulation due to improper CNAME record validation

Severity: Critical

CVSS Score: 8.7

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.