A flaw was found in Netty's `netty-codec-http` component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an attacker to bypass security controls or access unauthorized resources in proxy/backend deployments.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Io.netty
  • Netty-codec-http
Redhat
  • Amq Broker
  • Amq Clients
  • Apicurio Registry
  • Build Keycloak
  • Build Of Apache Camel For Quarkus
  • Build Of Apache Camel For Spring Boot
  • Build Of Apicurio Registry
  • Build Of Debezium 3
  • Build Of Keycloak
  • Build Of Quarkus
  • Camel Quarkus
  • Camel Spring Boot
  • Data Grid 8
  • Debezium
  • Fuse 7
  • Jboss Data Grid
  • Jboss Enterprise Application Platform
  • Jboss Fuse
  • Quarkus
  • Red Hat Single Sign On
  • Single Sign-on

No data.

No data.

References
Link Providers
https://access.redhat.com/errata/RHSA-2026:69440 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:69470 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:83612 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2026-93574 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2536966 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-93574 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-93574 cve-icon
History

Thu, 15 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:debezium:3 cpe:/a:redhat:debezium:3.6
References

Fri, 09 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat quarkus
CPEs cpe:/a:redhat:quarkus:3.27::el8
cpe:/a:redhat:quarkus:3.33::el8
Vendors & Products Redhat quarkus

Tue, 22 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
References

Mon, 21 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Io.netty
Io.netty netty-codec-http
Redhat build Of Apache Camel For Quarkus
Redhat build Of Apache Camel For Spring Boot
Redhat build Of Apicurio Registry
Redhat build Of Debezium 3
Redhat build Of Keycloak
Redhat build Of Quarkus
Redhat data Grid 8
Redhat fuse 7
Redhat single Sign-on
Vendors & Products Io.netty
Io.netty netty-codec-http
Redhat build Of Apache Camel For Quarkus
Redhat build Of Apache Camel For Spring Boot
Redhat build Of Apicurio Registry
Redhat build Of Debezium 3
Redhat build Of Keycloak
Redhat build Of Quarkus
Redhat data Grid 8
Redhat fuse 7
Redhat single Sign-on

Mon, 21 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 21 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:quarkus:3
Vendors & Products Redhat quarkus
References

Sat, 19 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in Netty's `netty-codec-http` component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an attacker to bypass security controls or access unauthorized resources in proxy/backend deployments.
Title Io.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsing
First Time appeared Redhat
Redhat amq Broker
Redhat amq Clients
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
Weaknesses CWE-444
CPEs cpe:/a:redhat:amq_broker:7
cpe:/a:redhat:amq_clients:2023
cpe:/a:redhat:apicurio_registry:3
cpe:/a:redhat:build_keycloak:
cpe:/a:redhat:camel_quarkus:3
cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:debezium:3
cpe:/a:redhat:jboss_data_grid:8
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:quarkus:3
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat amq Broker
Redhat amq Clients
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
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-18T20:12:43.146Z

Updated: 2026-10-15T17:01:26.141Z

Reserved: 2026-09-18T10:31:41.514Z

Link: CVE-2026-93574

cve-icon Vulnrichment

Updated: 2026-09-21T18:18:59.939Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T21:18:48.277

Modified: 2026-10-15T17:17:31.810

Link: CVE-2026-93574

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-10T00:52:52Z

Links: CVE-2026-93574 - Bugzilla