Detections
Analytics
CVE-2026-73507
high
Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
References
https://github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3
https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b