CVE-2026-45674
CWE-345Published: June 12, 2026· Updated: Jul 15, 2026
Official Description
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.
Risk Analysis
This critical vulnerability in Netty's DnsResolveContext allows for potential DNS-related attacks due to improper validation of CNAME records. The flaw fails to validate the origin of CNAME records in DNS responses. With a CVSS score of 10.0, this issue is extremely severe and could lead to various network-based attacks.
No public exploit is currently known for this vulnerability. The flaw is remotely exploitable due to its network attack vector and low attack complexity.
Upgrade Netty to versions 4.1.135.Final or 4.2.15.Final. Ensure that all applications using Netty are updated to the patched versions.
Technical Analysis
CVE-2026-45674 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 10.0.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (11)
Quick Facts
Related CVEs (CWE-345)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-45674 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts