CVE-2026-45674 PUBLISHED

Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records

Assigner: GitHub_M
Reserved: 12.05.2026 Published: 12.06.2026 Updated: 12.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 8.7

Attack Vector	Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	netty
Product	netty
Versions	Version >= 4.2.0.Final, < 4.2.15.Final is affected Version < 4.1.135.Final is affected

References

https://github.com/netty/netty/security/advisories/GHSA-676x-f7gg-47vc
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final

Problem Types

CWE-345: Insufficient Verification of Data Authenticity CWE