CVE-2026-93491
Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue
CVSS Score
7.5
EPSS Score
0.7%
EPSS Percentile
53th
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.
| CWE | CWE-770 |
| 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-2026-93491 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2536891 github.com: https://github.com/netty/netty/releases/tag/netty-4.1.138.Final github.com: https://github.com/netty/netty/releases/tag/netty-4.2.18.Final