Netty DnsResolveContext CNAME Bailiwick Validation Flaw (before 4.1.135,4.2.15)
CVE-2026-45674 Published on June 12, 2026
Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records
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.
Vulnerability Analysis
CVE-2026-45674 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Insufficient Verification of Data Authenticity
The software does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
Products Associated with CVE-2026-45674
Want to know whenever a new CVE is published for Netty? stack.watch will email you.
Affected Versions
netty:- Version >= 4.2.0.Final, < 4.2.15.Final is affected.
- Version < 4.1.135.Final is affected.