CVE-2026-93569
Io.netty/netty-codec-http2: http/1 absolute-form host mismatch is translated to http/2 :authority, overriding the request-target authority
CVSS Score
8.2
EPSS Score
2.2%
EPSS Percentile
82th
A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process. When an HTTP/1 request includes both an absolute-form request-target and a conflicting Host header, Netty incorrectly prioritizes the Host header for the HTTP/2 :authority field, discarding the original request-target authority. This inconsistency can allow an attacker to bypass security controls in Netty-based proxies or gateways, potentially leading to unauthorized access, cache poisoning, or misrouting of requests.
| CWE | CWE-444 |
| Vendor | red hat |
| Product | red hat build of apache camel 3.33.3.sp2 |
| Published | Sep 18, 2026 |
| Last Updated | Nov 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
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-2026-93569 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2536962