Detections
Analytics
CVE-2026-44249
high
Description
Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44249.json
https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
https://bugzilla.redhat.com/show_bug.cgi?id=2488081
https://access.redhat.com/security/cve/CVE-2026-44249
https://access.redhat.com/errata/RHSA-2026:34608
https://access.redhat.com/errata/RHSA-2026:28573
https://access.redhat.com/errata/RHSA-2026:26586