CVE-2026-93491
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Awaiting Analysis - secalert@redhat.com
- Published
- 2026-09-18
- Last modified
- 2026-10-15
- Weaknesses
- CWE-770
Affected products
- Amq Broker (Redhat)
- Amq Clients (Redhat)
- Apache Camel Quarkus (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 (Redhat)
References
- https://access.redhat.com/errata/RHSA-2026:69440
- https://access.redhat.com/errata/RHSA-2026:69470
- https://access.redhat.com/errata/RHSA-2026:70257
- https://access.redhat.com/errata/RHSA-2026:83612
- https://access.redhat.com/security/cve/CVE-2026-93491
- https://bugzilla.redhat.com/show_bug.cgi?id=2536891
- https://github.com/netty/netty/releases/tag/netty-4.1.138.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.18.Final
