High 7.5Published Sep 18, 2026

CVE-2026-93491Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue

Updated under an hour ago (Oct 27, 2026, 5:10 PM ET)

Does this affect you?

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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Every CVE for Red Hat Build of Apache Camel 3.33.3.SP2

Exploited in the last 30 days

A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumption and a denial of service due to memory exhaustion.

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-770
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

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
1–10 of 13

References

References

https://access.redhat.com/errata/RHSA-2026:69440	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:69470	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:70257	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83612	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-93491	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2536891	issue-tracking, x-refsource-redhat
https://github.com/netty/netty/releases/tag/netty-4.1.138.Final
https://github.com/netty/netty/releases/tag/netty-4.2.18.Final

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.