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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":[{"vendor":"Red Hat","product":"Red Hat AMQ Broker 7","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:amq_broker:7"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel 4 for Quarkus 3","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:camel_quarkus:3"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:camel_spring_boot:4"]},{"vendor":"Red Hat","product":"Red Hat build of Apicurio Registry 3","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:apicurio_registry:3"]},{"vendor":"Red Hat","product":"Red Hat build of Debezium 3","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:debezium:3"]},{"vendor":"Red Hat","product":"Red Hat Build of Keycloak","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:build_keycloak:"]},{"vendor":"Red Hat","product":"Red Hat Data Grid 8","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:jboss_data_grid:8"]},{"vendor":"Red Hat","product":"Red Hat Fuse 7","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:jboss_fuse:7"]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"netty-codec-http2","defaultStatus":"affected","cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69440","name":"RHSA-2026:69440","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:69470","name":"RHSA-2026:69470","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:70257","name":"RHSA-2026:70257","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-93567","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536955","name":"RHBZ#2536955","tags":["issue-tracking","x_refsource_REDHAT"]}],"datePublic":"2026-09-10T00:48:08.000Z","problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"Improper Input Validation","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-20: Improper Input Validation","workarounds":[{"lang":"en","value":"See https://github.com/netty/netty/security/advisories/GHSA-45h4-vhwh-fmhg for fixed versions and remediation guidance."}],"timeline":[{"lang":"en","time":"2026-09-10T00:48:08.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-10T00:48:08.000Z","value":"Made public."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-09-22T18:55:51.588Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T19:48:36.822411Z","id":"CVE-2026-93567","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-21T20:51:34.080Z"}}]}}