CVE-2026-93558Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service
Updated under an hour ago ()
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It affects Red Hat Build of Apache Camel 3.33.3.SP2 and 12 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1035
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 redhat:apache_camel_quarkus | from 4.1.138.Final-redhat-00001 not affected | CNA record |
Red Hat Red Hat Build of Debezium 3.6 redhat:debezium | 3.6 | CNA record |
Red Hat Red Hat build of Quarkus 3.27.5.SP2 redhat:quarkus | 3.27 | CNA record |
Red Hat Red Hat AMQ Broker 7 redhat:amq_broker | 7 | CNA record |
Red Hat Red Hat AMQ Clients redhat:amq_clients | 2023 | CNA record |
Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 redhat:camel_quarkus | 3 | CNA record |
Red Hat Red Hat build of Apache Camel for Spring Boot 4 redhat:camel_spring_boot | 4 | CNA record |
Red Hat Red Hat build of Apicurio Registry 3 redhat:apicurio_registry | 3 | CNA record |
Red Hat Red Hat Build of Keycloak redhat:build_keycloak | All versions | CNA record |
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid | 8 | CNA record |
Red Hat Red Hat Fuse 7 redhat:jboss_fuse | 7 | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform 7 redhat:jboss_enterprise_application_platform | 7 | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:69440vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:69470vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70257vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:83612vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-93558vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2536932issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.