CVE-2026-93558
Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service
CVSS Score
7.5
EPSS Score
1.0%
EPSS Percentile
63th
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.
| CWE | CWE-1035 |
| Vendor | red hat |
| Product | red hat build of apache camel 3.33.3.sp2 |
| Published | Sep 18, 2026 |
| Last Updated | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Build of Apache Camel 3.33.3.SP2
All versions affected Red Hat / Red Hat Build of Debezium 3.6
All versions affected Red Hat / Red Hat build of Quarkus 3.27.5.SP2
All versions affected Red Hat / Red Hat build of Quarkus 3.33.3.SP2
All versions affected Red Hat / Red Hat AMQ Broker 7
All versions affected Red Hat / Red Hat AMQ Clients
All versions affected Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3
All versions affected Red Hat / Red Hat build of Apache Camel for Spring Boot 4
All versions affected Red Hat / Red Hat build of Apicurio Registry 3
All versions affected Red Hat / Red Hat Build of Keycloak
All versions affected Red Hat / Red Hat Data Grid 8
All versions affected Red Hat / Red Hat Fuse 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 8
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69440 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69470 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:70257 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:83612 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-93558 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2536932