High 7.5Published Mar 27, 2026

CVE-2026-33870Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing

Updated under an hour ago (Oct 27, 2026, 10:50 AM ET)

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It affects netty and 26 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for netty

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-444
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

netty netty netty:netty (from the name)	before 4.1.132.Final; from 4.2.0.Alpha1, < 4.2.10.Final	CNA record
Red Hat Cryostat 4 on RHEL 9 redhat:cryostat	from 4.2.0-9 not affected	CISA ADP
Red Hat Red Hat AMQ Broker 7.12.7 redhat:amq_broker	from codec-http not affected	CISA ADP
Red Hat Red Hat Build of Apache Camel 4.14 for Quarkus 3.27 redhat:apache_camel_quarkus	from codec-http not affected	CISA ADP
Red Hat Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14 redhat:apache_camel_spring_boot	from codec-http not affected	CISA ADP
Red Hat Red Hat build of Quarkus 3.20.6 redhat:quarkus	from codec-http not affected	CISA ADP
Red Hat Red Hat Data Grid 8.6.1 redhat:jboss_data_grid	from codec-http not affected	CISA ADP
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 redhat:jboss_enterprise_application_platform	from codec-http not affected	CISA ADP
Red Hat Streams for Apache Kafka 2.9.4 redhat:amq_streams	from codec-http not affected	CISA ADP
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai	from 1776756834 not affected	CISA ADP
1–10 of 28

References

References

https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://w4ke.info/2025/06/18/funky-chunks.html	x-refsource-misc, technical-description
https://w4ke.info/2025/10/29/funky-chunks-2.html	x-refsource-misc, technical-description
https://www.rfc-editor.org/rfc/rfc9110	x-refsource-misc, technical-description
https://access.redhat.com/errata/RHSA-2026:10175
https://access.redhat.com/errata/RHSA-2026:10184
https://access.redhat.com/errata/RHSA-2026:13571
https://access.redhat.com/errata/RHSA-2026:14272
https://access.redhat.com/errata/RHSA-2026:14276
https://access.redhat.com/errata/RHSA-2026:17668
1–10 of 24

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.