Vulnerability Details CVE-2026-45673
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 DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 8.2%
CVSS Severity
CVSS v3 Score 6.8