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Vendor Workaround
See https://github.com/netty/netty/security/advisories/GHSA-2g37-3h88-55hc for fixed versions and remediation guidance.
Tracking
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Fri, 18 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service | 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. |
| Metrics |
ssvc
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Fri, 18 Sep 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service | |
| Title | Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service | |
| First Time appeared |
Redhat
Redhat amq Broker Redhat amq Clients Redhat apicurio Registry Redhat build Keycloak Redhat camel Quarkus Redhat camel Spring Boot Redhat debezium Redhat jboss Data Grid Redhat jboss Enterprise Application Platform Redhat jboss Fuse Redhat quarkus Redhat red Hat Single Sign On |
|
| Weaknesses | CWE-1035 | |
| CPEs | cpe:/a:redhat:amq_broker:7 cpe:/a:redhat:amq_clients:2023 cpe:/a:redhat:apicurio_registry:3 cpe:/a:redhat:build_keycloak: cpe:/a:redhat:camel_quarkus:3 cpe:/a:redhat:camel_spring_boot:4 cpe:/a:redhat:debezium:3 cpe:/a:redhat:jboss_data_grid:8 cpe:/a:redhat:jboss_enterprise_application_platform:7 cpe:/a:redhat:jboss_enterprise_application_platform:8 cpe:/a:redhat:jboss_fuse:7 cpe:/a:redhat:quarkus:3 cpe:/a:redhat:red_hat_single_sign_on:7 |
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| Vendors & Products |
Redhat
Redhat amq Broker Redhat amq Clients Redhat apicurio Registry Redhat build Keycloak Redhat camel Quarkus Redhat camel Spring Boot Redhat debezium Redhat jboss Data Grid Redhat jboss Enterprise Application Platform Redhat jboss Fuse Redhat quarkus Redhat red Hat Single Sign On |
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| References |
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| Metrics |
cvssV3_1
|
Subscriptions
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-18T20:22:37.565Z
Reserved: 2026-09-18T09:41:56.676Z
Link: CVE-2026-93558
Updated: 2026-09-18T14:53:49.044Z
Status : Awaiting Analysis
Published: 2026-09-18T15:17:19.590
Modified: 2026-09-18T21:18:46.593
Link: CVE-2026-93558
No data.
OpenCVE Enrichment
Updated: 2026-09-18T23:15:17Z