CVE-2026-93567

CVE CVE-2026-93567EUVD EUVD-2026-82943Published 2026-09-18T14:23:27.000ZLast changed 2026-09-22T18:55:51.000ZCVSS 7.5

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Red Hat — Red Hat AMQ Broker 7
• Red Hat — Red Hat Build of Keycloak
• Red Hat — Red Hat Data Grid 8
• Red Hat — Red Hat Fuse 7
• Red Hat — Red Hat JBoss Enterprise Application Platform 7
• Red Hat — Red Hat JBoss Enterprise Application Platform 8
• Red Hat — Red Hat Single Sign-On 7
• Red Hat — Red Hat build of Apache Camel 4 for Quarkus 3
• Red Hat — Red Hat build of Apache Camel for Spring Boot 4
• Red Hat — Red Hat build of Apicurio Registry 3
• Red Hat — Red Hat build of Debezium 3
• Red Hat — Red Hat build of Quarkus

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Red Hat — Red Hat JBoss Enterprise Application Platform
• Red Hat — Red Hat build of Keycloak

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.