Security Advisory

CVE-2026-59898

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-29 18:02:07

Last updated 2026-07-29 18:02:07

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

Description

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 (or V08) handshaker by sending `Sec-WebSocket-Version: 7` and omitting `Connection: Upgrade` / `Upgrade: websocket` headers, completing a protocol switch that a proxy would not recognize as an Upgrade request and enabling HTTP request smuggling / protocol-confusion attacks. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

← Browse all CVEs View on cve.org ↗