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7.5 High

CVE-2026-93567 Io.netty/netty-codec-http2: http/1 authority-form connect is translated to malformed http/2 connect with host-controlled :authority

Description

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leading to a malformed HTTP/2 CONNECT request. This can bypass security controls such as tunnel allow-lists or egress policies, resulting in integrity loss.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat AMQ Broker 7 Versions not published
Red Hat build of Apache Camel 4 for Quarkus 3 Versions not published
Red Hat build of Apache Camel for Spring Boot 4 Versions not published
Red Hat build of Apicurio Registry 3 Versions not published
Red Hat build of Debezium 3 Versions not published
Red Hat Build of Keycloak Versions not published
Red Hat build of Quarkus Versions not published
Red Hat Data Grid 8 Versions not published
Red Hat Fuse 7 Versions not published
Show the 9 other branches
Product Affected versions Fixed in
Red Hat JBoss Enterprise Application Platform 7 Versions not published
Red Hat JBoss Enterprise Application Platform 8 Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat Build of Apache Camel 3.33.3.SP2 4.1 earliest → < 4.1.138.Final-redhat-00001 4.1.138.Final-redhat-00001
Red Hat build of Quarkus 3.27.5.SP2 Versions not published
Red Hat build of Quarkus 3.33.3.SP2 Versions not published
Red Hat Build of Debezium 3.6 Versions not published
Red Hat JBoss Enterprise Application Platform Expansion Pack Versions not published
Red Hat JBoss Enterprise Application Platform 8.1 Versions not published

References

Timeline

  1. Published
  2. Last modified

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