CVE-2026-44249

HIGH SEVERITY

CVSS Score & Metrics

Base Score

8.1 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 08, 2026

Last Modified

June 17, 2026

CWE ID

CWE-284

Source

GitHub

Vendor

maven

Product

io.netty:netty-handler

External References

https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
https://github.com/advisories/GHSA-3qp7-7mw8-wx86

CVE-2026-44249

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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