Detections
Analytics
CVE-2026-93488
high
Description
A flaw was found in Netty. SpdySessionHandler accepts an unlimited number of concurrent remote-initiated streams because localConcurrentStreams defaults to Integer.MAX_VALUE and the handler provides no API to change it. A remote peer can open a SPDY connection and send a large number of SYN_STREAM frames with FLAG_FIN=0, causing unbounded heap and direct memory allocation that can lead to JVM OutOfMemoryError and a denial of service.
References
https://github.com/netty/netty/releases/tag/netty-4.2.18.Final
https://github.com/netty/netty/releases/tag/netty-4.1.138.Final