CVE-2026-44249
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 4.2.15.Final | affected |
| netty | netty | < 4.1.135.Final | affected |
Weaknesses
- CWE-284: CWE-284: Improper Access Control
- CWE-697: CWE-697: Incorrect Comparison
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation
Additional References
- https://access.redhat.com/security/cve/CVE-2026-44249
- https://bugzilla.redhat.com/show_bug.cgi?id=2488081
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44249.json
- https://access.redhat.com/errata/RHSA-2026:26586
- https://access.redhat.com/errata/RHSA-2026:28573
- https://access.redhat.com/errata/RHSA-2026:26018
- https://access.redhat.com/errata/RHSA-2026:26017
- https://access.redhat.com/errata/RHSA-2026:34608
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
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.