CVE-2026-33870: Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing
Description
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · CWE-444
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
netty: nettyRed Hat: Cryostat 4 on RHEL 9Red Hat: Logging Subsystem for Red Hat OpenShiftRed Hat: OpenShift ServerlessRed Hat: Red Hat AMQ Broker 7.12.7Red Hat: Red Hat AMQ Broker 7.13.5Red Hat: Red Hat AMQ Broker 7.14.0Red Hat: Red Hat AMQ ClientsRed Hat: Red Hat Build of Apache Camel 4.14 for Quarkus 3.27Red Hat: Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14Red Hat: Red Hat build of Apache Camel 4 for Quarkus 3Red Hat: Red Hat build of Apache Camel - HawtIO 4Red Hat: Red Hat build of Apicurio Registry 2Red Hat: Red Hat build of Apicurio Registry 3Red Hat: Red Hat build of Debezium 3Red Hat: Red Hat Build of KeycloakRed Hat: Red Hat build of OptaPlanner 8Red Hat: Red Hat build of Quarkus 3.20.6Red Hat: Red Hat build of Quarkus 3.27.3Red Hat: Red Hat Data Grid 8.6.1Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat: Red Hat Fuse 7Red Hat: Red Hat JBoss Enterprise Application Platform 7Red Hat: Red Hat JBoss Enterprise Application Platform 8.1Red Hat: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat: Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat: Red Hat OpenShift AI 2.25Red Hat: Red Hat OpenShift AI (RHOAI)Red Hat: Red Hat OpenShift Dev Spaces 3.27Red Hat: Red Hat Process Automation 7Red Hat: Red Hat Satellite 6Red Hat: Red Hat Single Sign-On 7Red Hat: Streams for Apache Kafka 2.9.4Red Hat: streams for Apache Kafka 3Red Hat: Streams for Apache Kafka 3.2.0
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8 (opens in new tab)
- w4ke.info/2025/06/18/funky-chunks.html (opens in new tab)
- w4ke.info/2025/10/29/funky-chunks-2.html (opens in new tab)
- www.rfc-editor.org/rfc/rfc9110 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)