Netty RtspDecoder Method-Token Smuggling via RTSP Request
CVE-2026-93565 Published on September 18, 2026
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. This vulnerability allows an attacker to bypass method-based access controls and can also be used to launder malicious requests through Netty-based RTSP proxies, making them appear legitimate to backend systems.
Vulnerability Analysis
CVE-2026-93565 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.
Timeline
Reported to Red Hat.
Made public.
Weakness Type
OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017.
Products Associated with CVE-2026-93565
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Affected Versions
Red Hat Build of Apache Camel 3.33.3.SP2:- Version 4.1.138.Final-redhat-00001 and below * is unaffected.