CVE-2026-93558highCWE-1035

CVE-2026-93558: high-severity vulnerability in Red Hat AMQ Broker 7

Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 1.1%
A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this vulnerability by using HTTP/1.1 pipelining to send requests faster than the application can respond. This leads to an unbounded growth of a per-connection queue, consuming excessive memory. Eventually, this can cause the Java Virtual Machine (JVM) to exhaust its heap, resulting in a Denial of Service (DoS) for the affected server.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Red Hat · Red Hat AMQ Broker 7Red Hat · Red Hat AMQ ClientsRed Hat · Red Hat Build of Apache Camel 3.33.3.SP2Red Hat · Red Hat build of Apache Camel 4 for Quarkus 3Red Hat · Red Hat build of Apache Camel for Spring Boot 4Red Hat · Red Hat build of Apicurio Registry 3Red Hat · Red Hat Build of Debezium 3.6Red Hat · Red Hat Build of KeycloakRed Hat · Red Hat build of Quarkus 3.27.5.SP2Red Hat · Red Hat build of Quarkus 3.33.3.SP2Red Hat · Red Hat Data Grid 8Red Hat · Red Hat Fuse 7Red Hat · Red Hat JBoss Enterprise Application Platform 7Red Hat · Red Hat JBoss Enterprise Application Platform 8Red Hat · Red Hat Single Sign-On 7
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