Inconsistent interpretation of HTTP requests in Netty - CVE-2026-33870

Vulnerability identifier: #VU124422

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-33870

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: Public exploit is available

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests within chunked transfer encoding extension values. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Netty
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Package Hub 15
Development Tools Module
openSUSE Leap
IBM App Connect for Manufacturing
IBM SPSS Analytic Server
IBM Watson Discovery for IBM Cloud Pak for Data
IBM Decision Optimization for Cloud Pak for Data
IBM Sterling Partner Engagement Manager
UCD - IBM UrbanCode Deploy
Confluence Data Center
Bitbucket Data Center
Jira Software Data Center
Bamboo Data Center
Jira Service Management Data Center
IBM Automation Decision Services
Red Hat Integration Camel Extensions for Quarkus
DataStage on Cloud Pak for Data
DevOps Deploy
Rational Performance Tester
DevOps Test Performance
Storage Protect Server
IBM DB2
Oracle Database Server
Oracle Communications Cloud Native Core Policy
netty-tcnative-javadoc
netty-tcnative-debugsource
netty-tcnative
netty
netty-javadoc
Red Hat Camel for Spring Boot
JBoss Data Grid

Install updates from vendor's website.

Netty - addressed in versions 4.1.132, 4.2.11
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.2
IBM Decision Optimization for Cloud Pak for Data - update to 5.3.1 patch 4
DataStage on Cloud Pak for Data - update to 5.4
IBM Sterling Partner Engagement Manager - addressed in versions 6.2.3.6, 6.2.4.4
UCD - IBM UrbanCode Deploy - addressed in versions 7.2.3.24, 7.3.2.19
DevOps Deploy - addressed in versions 8.0.1.14, 8.1.2.7, 8.2.2.0
Confluence Data Center - addressed in versions 9.2.19, 10.2.10
Bitbucket Data Center - addressed in versions 9.4.22, 10.2.4, 10.3.1
Jira Software Data Center - addressed in versions 9.12.28, 10.3.22, 11.3.5
Bamboo Data Center - addressed in versions 10.2.18, 12.1.6
Jira Service Management Data Center - addressed in versions 10.3.22, 11.3.5
DevOps Test Performance - update to 11.0.8
Oracle Database Server - update to 19.4
IBM Automation Decision Services - addressed in versions 24.0.0.0.9, 24.0.1.0.8, 25.0.0.0.4
Red Hat Integration Camel Extensions for Quarkus - update to p
netty-tcnative-javadoc - update to 2.0.75-150200.3.36.1
netty-tcnative-debugsource - update to 2.0.75-150200.3.36.1
netty-tcnative - update to 2.0.75-150200.3.36.1
netty - update to 4.1.132-150200.4.43.1
netty-javadoc - update to 4.1.132-150200.4.43.1
Red Hat Camel for Spring Boot - update to 4.14
Storage Protect Server - update to 8.2.2
JBoss Data Grid - update to 8.6.1

• Exploit #12518 - RFC violation: HTTP Request Smuggling primitive via Chunked Extension Quoted-String Parsing (March 25, 2026)

• https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8

• Multiple vulnerabilities in Netty
• SUSE update for netty, netty-tcnative
• IBM DevOps Test Performance update for Netty
• Multiple vulnerabilities in Oracle Database Server
• Multiple vulnerabilities in Oracle Communications Cloud Native Core Policy
• Bamboo Data Center update for netty-codec-http
• Confluence Data Center update for netty-codec-http
• IBM Watson Discovery Cartridge update for Netty
• IBM App Connect for Manufacturing update for Netty
• Multiple vulnerabilities in IBM SPSS Analytic Server
• Multiple vulnerabilities in IBM Decision Optimization for Cloud Pak for Data
• Multiple vulnerabilities in JBoss Data Grid 8.6
• Multiple vulnerabilities in Jira Service Management Data Center and Jira Service Management Server
• Multiple vulnerabilities in Jira Software Data Center
• IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) update for Netty
• Multiple vulnerabilities in IBM DataStage on Cloud Pak for Data
• Multiple vulnerabilities in IBM Db2
• Multiple vulnerabilities in IBM Sterling Partner Engagement Manager
• Multiple vulnerabilities in Bitbucket Data Center
• IBM Storage Protect Server update for Netty
• Multiple vulnerabilities in IBM Automation Decision Services
• Multiple vulnerabilities in Red Hat Integration Camel Extensions for Quarkus
• Multiple vulnerabilities in Red Hat Camel for Spring Boot 4