CVE-2026-93565 Io.netty/netty-codec-http: netty rtspdecoder method-token smuggling via trailing control byte

A flaw was found in Netty RtspDecoder. The RtspMethods.valueOf function incorrectly strips trailing control bytes from method tokens in Real-Time Streaming Protocol RTSP requests. A remote attacker can exploit this by sending a specially crafted RTSP request, leading to method-token smuggling. Th...

CVE-2026-93565

CVE-2026-93565 affects Netty's netty-codec-http module , specifically the RtspMethods.valueOf() method used by RtspDecoder. The root cause is that valueOf() silently strips trailing control bytes (code point ≤ 0x20) before performing a cache lookup against its ten pre-populated method constants. ...