CVE-2026-93574

Io.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsing

Published: Sep 18, 2026Updated: Sep 22, 2026 Sources: CVE List NVDCWE-444

6.5MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:LAvailability

Low

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Weaknesses

CWE-444

Affected Products

Red Hat

commercial·US

Red Hat AMQ Broker 7On-prem

Operating Systems / linux-distro

Red Hat AMQ ClientsOn-prem

Operating Systems / linux-distro

Red Hat build of Apache Camel 4 for Quarkus 3LibraryLibrary

OSS Libraries / generic-library

Red Hat build of Apache Camel for Spring Boot 4LibraryLibrary

OSS Libraries / generic-library

Red Hat build of Apicurio Registry 3On-prem

DevTools & CI

Red Hat build of Debezium 3On-premLibrary

OSS Libraries / generic-library

Red Hat Build of Keycloak

Web & CMS Plugins

Red Hat Data Grid 8On-premDatabase

Databases / cache-message-queue

and 4 more affected products View all →

Exploitability

Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://access.redhat.com/errata/RHSA-2026:69440

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:69470

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-93574

access.redhat.com

and 1 more references View all →

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