CVE-2026-93575High· 7.5▾ TwilightA flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Re…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 7.5
none → high
0.4%
A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-93562Medium· 6.5A flaw was found in Netty's HTTP/1 decoder
CVE-2026-93579Medium· 6.5A flaw was found in Netty's HTTP/2 stack
CVE-2026-93558High· 7.5A flaw was found in Netty's WebSocketServerExtensionHandler
CVE-2026-93565High· 7.5A flaw was found in Netty RtspDecoder
CVE-2026-93564High· 7.5A flaw was found in Netty
CVE-2026-93566Medium· 6.5A flaw was found in Netty