Detections
Analytics
CVE-2026-42579
critical
Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42579.json
https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
https://bugzilla.redhat.com/show_bug.cgi?id=2477217
https://access.redhat.com/security/cve/CVE-2026-42579
https://access.redhat.com/errata/RHSA-2026:37390
https://access.redhat.com/errata/RHSA-2026:36820
https://access.redhat.com/errata/RHSA-2026:28010
https://access.redhat.com/errata/RHSA-2026:25123