CVE record · CVE-2026-93558

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

CVSS 7.5 HighEPSS 0.011 · 65th percentile

Published by the CVE Program (CNA: redhat) at 18 Sept 2026, 14:09 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 Package name: io.netty/netty-codec-http https://access.redhat.com/downloads/content/package-browser/
  • unaffected 4.1.138.Final-redhat-00001 to before * rpm
Other versions: affected
Red Hat Red Hat Build of Debezium 3.6 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat build of Quarkus 3.27.5.SP2 Package name: netty-codec-http https://access.redhat.com/jbossnetwork/restricted/listSoftware.html No versions given Other versions: unaffected
Red Hat Red Hat build of Quarkus 3.33.3.SP2 Package name: netty-codec-http https://access.redhat.com/jbossnetwork/restricted/listSoftware.html No versions given Other versions: unaffected
Red Hat Red Hat AMQ Broker 7 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat AMQ Clients Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat build of Apache Camel for Spring Boot 4 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat build of Apicurio Registry 3 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat Build of Keycloak Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat Data Grid 8 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Red Hat Red Hat Fuse 7 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unknown
Red Hat Red Hat JBoss Enterprise Application Platform 7 Package name: netty-codec-http https://access.redhat.com/jbossnetwork/restricted/listSoftware.html No versions given Other versions: unknown
Red Hat Red Hat JBoss Enterprise Application Platform 8 Package name: netty-codec-http https://access.redhat.com/jbossnetwork/restricted/listSoftware.html No versions given Other versions: affected
Red Hat Red Hat Single Sign-On 7 Package name: netty-codec-http https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Identifiers
CVE-2026-93558
CNA
redhat
Weakness (CWE)
CWE-1035
Published
18 Sept 2026
Updated
15 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.011, the 65th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 18 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.