CVE-2026-935587.5HighCWE-1035

CVE-2026-93558: Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service

Red Hat · Red Hat Build of Apache Camel 3.33.3.SP2

Vendor fix available · Affected: Red Hat Build of Apache Camel 3.33.3.SP2 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.2%probability of exploitation in the next 30 days

69th percentile

050100

Higher than 69% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products20

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Red Hat · Red Hat Build of Apache Camel 3.33.3.SP2Versions not stated
Red Hat · Red Hat Build of Debezium 3.6Versions not stated
Red Hat · Red Hat build of Keycloak 26.4Versions not stated
Red Hat · Red Hat build of Keycloak 26.4Versions not stated
Red Hat · Red Hat build of Keycloak 26.4Versions not stated
Red Hat · Red Hat build of Keycloak 26.4.17Versions not stated
Red Hat · Red Hat build of Keycloak 26.6Versions not stated
Red Hat · Red Hat build of Keycloak 26.6Versions not stated
Red Hat · Red Hat build of Keycloak 26.6Versions not stated
Red Hat · Red Hat build of Keycloak 26.6.8Versions not stated
Red Hat · Red Hat build of Quarkus 3.27.5.SP2Versions not stated
Red Hat · Red Hat build of Quarkus 3.33.3.SP2Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 8.1Versions not stated
Red Hat · Red Hat AMQ Broker 7Versions not stated
Red Hat · Red Hat AMQ ClientsVersions not stated
Red Hat · Red Hat build of Apache Camel 4 for Quarkus 3Versions not stated
Red Hat · Red Hat build of Apache Camel for Spring Boot 4Versions not stated
Red Hat · Red Hat build of Apicurio Registry 3Versions not stated
Red Hat · Red Hat Data Grid 8Versions not stated
Red Hat · Red Hat Fuse 7Versions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: CWE-1035 · Other weaknesses
Vendor: Red Hat
Published: September 2026
Band: Possible (1 to 10%), September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-93558 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.