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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.8
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
- EPSS probability
- 0.26%
- CWE
- CWE-330, CWE-340
- Published
- 2026-06-12
- Last modified
- 2026-06-12
Affected products
- netty netty
- netty netty
Weakness type
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