CVE-2026-44249

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-06-11 | Updated 2026-06-13 | Assigner GitHub_M

Problem types

CWE-284: Improper Access Control

CWE-697: Incorrect Comparison

Product status

References

github.com/.../netty/security/advisories/GHSA-3qp7-7mw8-wx86

github.com/netty/netty/releases/tag/netty-4.1.135.Final

github.com/netty/netty/releases/tag/netty-4.2.15.Final

cve.org (CVE-2026-44249)

nvd.nist.gov (CVE-2026-44249)

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