Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-93491
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 — Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N N H 7.5 .0073 53.5 —
AFFECTED
Product Versions Fixed
Red Hat Build of Apache Camel 3.33.3.SP2 unspecified 4.1.138.Final-redhat-00001
Red Hat Build of Debezium 3.6 unspecified —
Red Hat build of Quarkus 3.27.5.SP2 unspecified —
Red Hat build of Quarkus 3.33.3.SP2 unspecified —
Red Hat AMQ Broker 7 unspecified —
Red Hat AMQ Clients unspecified —
Red Hat build of Apache Camel 4 for Quarkus 3 unspecified —
Red Hat build of Apache Camel for Spring Boot 4 unspecified —
Red Hat build of Apicurio Registry 3 unspecified —
Red Hat Build of Keycloak unspecified —
+ 5 more
TIMELINE
Sep 18 Reserved by redhat
Sep 18 Published (CNA: redhat)
Oct 9 PATCH SHIPPED — CVE-2026-93491 (Red Hat Build of Apache Camel 3.33.3.SP2). Fixed in Red Hat Build of Apache Camel 3.33.3.SP2 4.1.138.Final-redhat-00001.
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 18, 2026 | Reserved | Reserved by redhat |
| September 18, 2026 | Published | Published (CNA: redhat) |
| October 9, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-93491 (Red Hat Build of Apache Camel 3.33.3.SP2). Fixed in Red Hat Build of Apache Camel 3.33.3.SP2 4.1.138.Final-redhat-00001. |
Affected
Affected products and packages — 15 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Build of Apache Camel 3.33.3.SP2 | — | — | 4.1.138.Final-redhat-00001 |
| Red Hat | Red Hat Build of Debezium 3.6 | — | — | — |
| Red Hat | Red Hat build of Quarkus 3.27.5.SP2 | — | — | — |
| Red Hat | Red Hat build of Quarkus 3.33.3.SP2 | — | — | — |
| Red Hat | Red Hat AMQ Broker 7 | — | — | — |
| Red Hat | Red Hat AMQ Clients | — | — | — |
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 | — | — | — |
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 | — | — | — |
| Red Hat | Red Hat build of Apicurio Registry 3 | — | — | — |
| Red Hat | Red Hat Build of Keycloak | — | — | — |
| Red Hat | Red Hat Data Grid 8 | — | — | — |
| Red Hat | Red Hat Fuse 7 | — | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | — | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | — | — | — |
| Red Hat | Red Hat Single Sign-On 7 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-93491 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
