---
id: CVE-2026-93568
title: A flaw was found in Netty
summary: >-
  A flaw was found in Netty. A remote attacker could exploit this vulnerability
  by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests.
  Netty's HTTP-object conversion path incorrectly processes these requests as
  regular HT…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-20
vendor: Red Hat
product: netty-codec-http2
affected:
  - netty-codec-http2
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
  - netty-codec-http2 (all versions)
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:16:58.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93568'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:69440'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:69470'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:70257'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93568'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536961'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93568.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93568'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93568'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T15:19:46.334573Z'
epss: 0.0077
epssPercentile: 0.5367
ingestedAt: '2026-09-18T14:43:13.061Z'
---

## Overview

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical protocol and path information. This misinterpretation can allow attackers to bypass security policies, such as routing or authorization logic, in applications that rely on Netty for HTTP/2 or HTTP/3 communication, resulting in integrity loss.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apicurio Registry 3, Red Hat build of Debezium 3, Red Hat Build of Keycloak, Red Hat Data Grid 8, … · no fix planned: Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7, Red Hat build of Apache Camel 4 for Quarkus 3, … · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93568.json)