CVE-2026-45673

MediumCVSS 6.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.8/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

Weakness enumeration

CWE-330CWE-340

Affected software

VendorProductVersions
nettynetty>= 4.2.0.Final, < 4.2.15.Final; < 4.1.135.Final

References

Timeline

Published
Jun 12, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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