cve.bz

CVE-2026-45673

6.8 mediumEPSS 0.3%

Medium (6.8) in netty netty. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in io.netty:netty-resolver-dns 4.1.135.Final, 4.2.15.Final.

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.

Severity

CVSS 3.1

6.8 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
CWEs
CWE-330, CWE-340
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-xmv7-r254-6q78Mavenio.netty:netty-resolver-dns>=4.2.0.Final <4.2.15.Final4.2.15.Final
GHSA-xmv7-r254-6q78Mavenio.netty:netty-resolver-dns<4.1.135.Final4.1.135.Final

References

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