CVE-2026-93567
Io.netty/netty-codec-http2: http/1 authority-form connect is translated to malformed http/2 connect with host-controlled :authority
CVSS Score
7.5
EPSS Score
2.6%
EPSS Percentile
85th
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.
| CWE | CWE-20 |
| Vendor | red hat |
| Product | red hat build of apache camel 3.33.3.sp2 |
| Published | Sep 18, 2026 |
| Last Updated | Oct 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Build of Apache Camel 3.33.3.SP2
All versions affected Red Hat / Red Hat Build of Debezium 3.6
All versions affected Red Hat / Red Hat build of Quarkus 3.27.5.SP2
All versions affected Red Hat / Red Hat build of Quarkus 3.33.3.SP2
All versions affected Red Hat / Red Hat AMQ Broker 7
All versions affected Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3
All versions affected Red Hat / Red Hat build of Apache Camel for Spring Boot 4
All versions affected Red Hat / Red Hat build of Apicurio Registry 3
All versions affected Red Hat / Red Hat Build of Keycloak
All versions affected Red Hat / Red Hat Data Grid 8
All versions affected Red Hat / Red Hat Fuse 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 8
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69440 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69470 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:70257 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:83612 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-93567 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2536955