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Medium severity6.8NVD Advisory· Published Jun 12, 2026· Updated Jun 15, 2026

CVE-2026-45673

CVE-2026-45673

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 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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
io.netty:netty-resolver-dnsMaven
>= 4.2.0.Final, < 4.2.15.Final4.2.15.Final
io.netty:netty-resolver-dnsMaven
< 4.1.135.Final4.1.135.Final

Affected products

164

Patches

Vulnerability mechanics

References

5

News mentions

1