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Vulnerability · Published Sep 18, 2026 · Assigned by redhat

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

High 7.5

In plain English

A high-severity improper input validation in Red Hat AMQ Broker 7 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.6%top 14.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12nettyno fix listedDEBIAN-CVE-2026-93567
Debian:13nettyno fix listedDEBIAN-CVE-2026-93567
Debian:14nettyno fix listedDEBIAN-CVE-2026-93567
Ubuntu:26.10nettyno fix listedUBUNTU-CVE-2026-93567

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 see references
Red Hat Red Hat Build of Debezium 3.6 see references
Red Hat Red Hat build of Quarkus 3.27.5.SP2 see references
Red Hat Red Hat build of Quarkus 3.33.3.SP2 see references
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 see references
Red Hat Red Hat AMQ Broker 7 see references
Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 see references
Red Hat Red Hat build of Apache Camel for Spring Boot 4 see references
Red Hat Red Hat build of Apicurio Registry 3 see references
Red Hat Red Hat Build of Keycloak see references
Red Hat Red Hat Data Grid 8 see references
Red Hat Red Hat Fuse 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 8 see references
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack see references
Red Hat Red Hat Single Sign-On 7 see references

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References