Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.2%
exploitation probability
0.2%top 84% of all CVEs
observed exploitation
nono source reports it
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 DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products
netty · nettyReferences
https://access.redhat.com/errata/RHSA-2026:26017https://access.redhat.com/errata/RHSA-2026:26018https://access.redhat.com/errata/RHSA-2026:26586https://access.redhat.com/errata/RHSA-2026:34608https://access.redhat.com/errata/RHSA-2026:37390https://access.redhat.com/errata/RHSA-2026:41951https://access.redhat.com/errata/RHSA-2026:48151https://access.redhat.com/errata/RHSA-2026:49700https://access.redhat.com/errata/RHSA-2026:49701https://access.redhat.com/errata/RHSA-2026:53644https://access.redhat.com/errata/RHSA-2026:53806https://access.redhat.com/security/cve/CVE-2026-45674