Read the docs
TI-2026-63029 Aliases CVE-2026-93558GHSA-wfpc-rccm-rq4m

Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in…

Priority HIGH 72CWE-1035Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 9 fixed, 9 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01223 68th percentileScored 2026-11-07
Fix Partial Red Hat: 9 advisoriesRed Hat: 9 fixed, 9 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Build of Apache Camel 3.33.3.SP2—4.1.138.Final-redhat-00001Patch availableCNA
Red HatRed Hat Build of Debezium 3.6——Not affectedCNA
Red HatRed Hat build of Keycloak 26.4—26.4.17-2Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-29Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-30Patch availableCNA
Red HatRed Hat build of Keycloak 26.4.17——Not affectedCNA
Red HatRed Hat build of Keycloak 26.6—26.6.8-2Patch availableCNA
Red HatRed Hat build of Keycloak 26.6—26.6-24Patch availableCNA
Red HatRed Hat build of Keycloak 26.6—26.6-24Patch availableCNA
Red HatRed Hat build of Keycloak 26.6.8——Not affectedCNA
Red HatRed Hat build of Quarkus 3.27.5.SP2——Not affectedCNA
Red HatRed Hat build of Quarkus 3.33.3.SP2——Not affectedCNA
Red HatRed Hat JBoss Enterprise Application Platform 8.1——Not affectedCNA
Red HatRed Hat AMQ Broker 7——No fix listedCNA
Red HatRed Hat AMQ Clients——No fix listedCNA
Red HatRed Hat build of Apache Camel 4 for Quarkus 3——No fix listedCNA
Red HatRed Hat build of Apache Camel for Spring Boot 4——No fix listedCNA
Red HatRed Hat build of Apicurio Registry 3——No fix listedCNA
Red HatRed Hat Data Grid 8——No fix listedCNA
Red HatRed Hat Fuse 7——No fix listedCNA
Red HatRed Hat JBoss Enterprise Application Platform 7——No fix listedCNA
Red HatRed Hat Single Sign-On 7——No fix listedCNA
  • Red Hat Build of Apache Camel 3.33.3.SP2 VendorRed Hat Affected — Fixed in 4.1.138.Final-redhat-00001 Patch available CNA
  • Red Hat Build of Debezium 3.6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4.17-2 Patch available CNA
  • Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-29 Patch available CNA
  • Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-30 Patch available CNA
  • Red Hat build of Keycloak 26.4.17 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat build of Keycloak 26.6 VendorRed Hat Affected — Fixed in 26.6.8-2 Patch available CNA
  • Red Hat build of Keycloak 26.6 VendorRed Hat Affected — Fixed in 26.6-24 Patch available CNA
  • Red Hat build of Keycloak 26.6 VendorRed Hat Affected — Fixed in 26.6-24 Patch available CNA
  • Red Hat build of Keycloak 26.6.8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat build of Quarkus 3.27.5.SP2 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat build of Quarkus 3.33.3.SP2 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat JBoss Enterprise Application Platform 8.1 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat AMQ Broker 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat AMQ Clients VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat build of Apache Camel 4 for Quarkus 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat build of Apache Camel for Spring Boot 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat build of Apicurio Registry 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Data Grid 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Fuse 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat JBoss Enterprise Application Platform 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Single Sign-On 7 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 16

CPEVersionsRoleVendor
cpe:/a:redhat:apache_camel_quarkus:3.333.33—Red Hat
cpe:/a:redhat:debezium:3.63.6—Red Hat
cpe:/a:redhat:build_keycloak:26.4::el926.4—Red Hat
cpe:/a:redhat:build_keycloak:26.6::el926.6—Red Hat
cpe:/a:redhat:quarkus:3.27::el83.27—Red Hat
cpe:/a:redhat:quarkus:3.33::el83.33—Red Hat
cpe:/a:redhat:jboss_enterprise_application_platform:8.18.1—Red Hat
cpe:/a:redhat:amq_broker:77—Red Hat
cpe:/a:redhat:amq_clients:20232023—Red Hat
cpe:/a:redhat:camel_quarkus:33—Red Hat
  • cpe:/a:redhat:apache_camel_quarkus:3.33 Versions 3.33 — ·Red Hat
  • cpe:/a:redhat:debezium:3.6 Versions 3.6 — ·Red Hat
  • cpe:/a:redhat:build_keycloak:26.4::el9 Versions 26.4 — ·Red Hat
  • cpe:/a:redhat:build_keycloak:26.6::el9 Versions 26.6 — ·Red Hat
  • cpe:/a:redhat:quarkus:3.27::el8 Versions 3.27 — ·Red Hat
  • cpe:/a:redhat:quarkus:3.33::el8 Versions 3.33 — ·Red Hat
  • cpe:/a:redhat:jboss_enterprise_application_platform:8.1 Versions 8.1 — ·Red Hat
  • cpe:/a:redhat:amq_broker:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:amq_clients:2023 Versions 2023 — ·Red Hat
  • cpe:/a:redhat:camel_quarkus:3 Versions 3 — ·Red Hat
Show 6 more CPE
CPEVersionsRoleVendor
cpe:/a:redhat:camel_spring_boot:44—Red Hat
cpe:/a:redhat:apicurio_registry:33—Red Hat
cpe:/a:redhat:jboss_data_grid:88—Red Hat
cpe:/a:redhat:jboss_fuse:77—Red Hat
cpe:/a:redhat:jboss_enterprise_application_platform:77—Red Hat
cpe:/a:redhat:red_hat_single_sign_on:77—Red Hat
  • cpe:/a:redhat:camel_spring_boot:4 Versions 4 — ·Red Hat
  • cpe:/a:redhat:apicurio_registry:3 Versions 3 — ·Red Hat
  • cpe:/a:redhat:jboss_data_grid:8 Versions 8 — ·Red Hat
  • cpe:/a:redhat:jboss_fuse:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:jboss_enterprise_application_platform:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:red_hat_single_sign_on:7 Versions 7 — ·Red Hat

Remediation

Red Hat 9 advisories

  • RHSA-2026:95887 Released 2026-11-06 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 8.1.9 security update
    • Red Hat JBoss Enterprise Application Platform 8.1
  • RHSA-2026:95762 Released 2026-11-06 · Red Hat rating Important
    Red Hat build of Keycloak 26.6.8 Images Security Update
    • Red Hat build of Keycloak 26.6 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
  • RHSA-2026:95760 Released 2026-11-06 · Red Hat rating Important
    Red Hat build of Keycloak 26.4.17 Images Security Update
    • Red Hat build of Keycloak 26.4 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
Show 6 more Red Hat advisories
  • RHSA-2026:95761 Released 2026-11-06 · Red Hat rating Important
    Red Hat build of Keycloak 26.6.8 Security Update
    • Red Hat build of Keycloak 26.6.8
  • RHSA-2026:95759 Released 2026-11-06 · Red Hat rating Important
    Red Hat build of Keycloak 26.4.17 Security Update
    • Red Hat build of Keycloak 26.4.17
  • RHSA-2026:83612 Released 2026-10-15 · Red Hat rating Important
    Red Hat build of Debezium 3.6.3 release
    • Red Hat Build of Debezium 3.6
  • RHSA-2026:70257 Released 2026-09-22 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.3.SP2)
    • Red Hat Build of Apache Camel 3.33.3.SP2 com.github.luben.zstd-jni-1.5.7.16-rhel8-redhat-00001.jar, com.squareup.wire.wire-runtime-6.4.7.jar, com.squareup.wire.wire-runtime-jvm-6.4.7.jar +7
  • RHSA-2026:69440 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.33.3.SP2 release and security update
    • Red Hat build of Quarkus 3.33.3.SP2
  • RHSA-2026:69470 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.27.5.SP2 release and security update
    • Red Hat build of Quarkus 3.27.5.SP2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AMQ Broker 7AffectedNo fix yet
Red Hat AMQ ClientsAffectedNo fix yet
Red Hat Data Grid 8AffectedNo fix yet
Red Hat Fuse 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix planned: Out of support scope
Red Hat Single Sign-On 7AffectedNo fix yet: Fix deferred
Red Hat build of Apache Camel 4 for Quarkus 3AffectedNo fix yet
Red Hat build of Apache Camel for Spring Boot 4AffectedNo fix yet
Red Hat build of Apicurio Registry 3AffectedNo fix yet
Red Hat Build of Apache Camel 3.33.3.SP2Fixed RHSA-2026:70257
Red Hat Build of Debezium 3.6Fixed RHSA-2026:83612
Red Hat JBoss Enterprise Application Platform 8.1Fixed RHSA-2026:95887
Red Hat build of Keycloak 26.4Fixed RHSA-2026:95760
Red Hat build of Keycloak 26.4.17Fixed RHSA-2026:95759
Red Hat build of Keycloak 26.6Fixed RHSA-2026:95762
Red Hat build of Keycloak 26.6.8Fixed RHSA-2026:95761
Red Hat build of Quarkus 3.27.5.SP2Fixed RHSA-2026:69470
Red Hat build of Quarkus 3.33.3.SP2Fixed RHSA-2026:69440
Not affected: 1 product
  • Red Hat Build of Apache Camel 3.33.3.SP2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93558
  2. 2026-10-03 Alias added: GHSA-wfpc-rccm-rq4m
  3. 2026-10-09 Fix available: RHSA-2026:69440 · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:69470 · Red Hat
  5. 2026-10-09 Fix available: RHSA-2026:70257 · Red Hat
  6. 2026-10-10 Fix available: Red Hat Build of Apache Camel 3.33.3.SP2, Red Hat build of Quarkus 3.27.5.SP2, Red Hat build of Quarkus 3.33.3.SP2 · Red Hat
  7. 2026-10-10 Fix available: io.netty/[email protected] · CNA
  8. 2026-10-16 Affected versions changed · CNA
  9. 2026-10-16 1 new reference · CNA
  10. 2026-10-16 Fix available: RHSA-2026:83612 · Red Hat
  11. 2026-10-16 Fix available: Red Hat Build of Debezium 3.6 · Red Hat
  12. 2026-11-06 Fix available: [email protected], [email protected], [email protected] · CNA
  13. 2026-11-06 2 new references · CNA
  14. 2026-11-06 Fix available: RHSA-2026:95761 · Red Hat
  15. 2026-11-06 Fix available: Red Hat build of Keycloak 26.6.8 · Red Hat
  16. 2026-11-06 Affected versions changed · CNA
  17. 2026-11-06 1 new reference · CNA
  18. 2026-11-06 Fix available: rhbk/[email protected], rhbk/[email protected], rhbk/[email protected] +3 · CNA
  19. 2026-11-06 2 new references · CNA
  20. 2026-11-06 Fix available: RHSA-2026:95760 · Red Hat
  21. 2026-11-06 Fix available: RHSA-2026:95887 · Red Hat
  22. 2026-11-06 Fix available: RHSA-2026:95762 · Red Hat
  23. 2026-11-06 Fix available: RHSA-2026:95759 · Red Hat
  24. 2026-11-06 Fix available: Red Hat JBoss Enterprise Application Platform 8.1, Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.17 +1 · Red Hat

References

Advisory 9

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences