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-2026:54435
https://access.redhat.com/errata/RHSA-2026:53806
https://access.redhat.com/errata/RHSA-2026:53644
https://access.redhat.com/errata/RHSA-2026:50085
https://access.redhat.com/errata/RHSA-2026:49701
https://access.redhat.com/errata/RHSA-2026:49700
https://access.redhat.com/errata/RHSA-2026:48151
https://access.redhat.com/errata/RHSA-2026:48124
https://access.redhat.com/errata/RHSA-2026:41951
https://access.redhat.com/errata/RHSA-2026:37390
https://access.redhat.com/errata/RHSA-2026:36820
https://access.redhat.com/errata/RHSA-2026:34608
https://access.redhat.com/errata/RHSA-2026:28573
https://access.redhat.com/errata/RHSA-2026:26586