{"id":"CVE-2026-62243","title":"Netty (io.netty:netty-handler) versions from 4.2.0.Final through 4.2.16.Final and versions through 4.1.136.Final disable TLS hostname verification on the SslProvider.OPENSSL client path when a plain (non-extended) X509TrustManager is use…","summary":"Netty (io.netty:netty-handler) versions from 4.2.0.Final through 4.2.16.Final and versions through 4.1.136.Final disable TLS hostname verification on the SslProvider.OPENSSL client path when a plain (non-extended) X509TrustManager is use…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-297","CWE-295"],"vendor":"Red Hat","product":"Red Hat Ceph Storage 9","affected":["exploit_intelligence","openshift_serverless","amq_broker 7","build_of_apache_camel_4_for_quarkus 3","build_of_apache_camel_for_spring_boot 4","build_of_apicurio_registry 3","build_of_debezium 3","build_of_keycloak","build_of_quarkus","ceph_storage 6","ceph_storage 7","ceph_storage 8","ceph_storage 9","data_grid 8","enterprise_linux 10","enterprise_linux_ai_rhel_ai 3","fuse 7","jboss_enterprise_application_platform 7","jboss_enterprise_application_platform 8","jboss_enterprise_application_platform_expansion_pack","openshift_ai_rhoai","openshift_dev_spaces","satellite 6","single_sign_on 7","build_of_apache_camel_3_33_for_quarkus 3.33.3.SP1"],"patched":["build_of_apache_camel_3_33_for_quarkus 3.33.3.SP1"],"published":"2026-08-22","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:46:19.780","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62243","references":[{"url":"https://github.com/netty/netty/security/advisories/GHSA-p85m-gvr3-788c","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/netty-through-tls-hostname-verification-bypass","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62243.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-62243"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521309"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-62243"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62243"},{"url":"https://access.redhat.com/errata/RHSA-2026:63302"},{"url":"https://access.redhat.com/errata/RHSA-2026:66545"},{"url":"https://access.redhat.com/errata/RHSA-2026:66488"},{"url":"https://access.redhat.com/errata/RHSA-2026:68276"},{"url":"https://access.redhat.com/errata/RHSA-2026:68280"},{"url":"https://access.redhat.com/errata/RHSA-2026:68278"},{"url":"https://access.redhat.com/errata/RHSA-2026:68277"},{"url":"https://access.redhat.com/errata/RHSA-2026:69296"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00155,"epssPercentile":0.05013,"ingestedAt":"2026-08-23T04:42:14.622Z","slug":"CVE-2026-62243","body":"## Overview\n\nNetty (io.netty:netty-handler) versions from 4.2.0.Final through 4.2.16.Final and versions through 4.1.136.Final disable TLS hostname verification on the SslProvider.OPENSSL client path when a plain (non-extended) X509TrustManager is used and Unsafe-based trust-manager wrapping is unavailable (Java 25+). In this configuration the OpenSSL client does not perform hostname verification, allowing a man-in-the-middle attacker to present a certificate issued for a different hostname that is accepted without validation. Fixed in 4.2.17.Final and 4.1.137.Final.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:63302** · Red Hat · fixed in: Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.3.SP1 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:63302)\n- **Red Hat VEX** · Important · affected: Exploit Intelligence, OpenShift Serverless, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apicurio Registry 3, Red Hat build of Debezium 3, … · no fix planned: Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Ceph Storage 6, Red Hat Ceph Storage 7, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62243.json)\n- **RHSA-2026:66545** · Red Hat · fixed in: Red Hat AMQ Broker 7.13.6 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66545)\n- **RHSA-2026:66488** · Red Hat · fixed in: Red Hat AMQ Broker 7.14.1 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66488)\n- **RHSA-2026:68276** · Red Hat · fixed in: Red Hat build of Keycloak 26.4 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68276)\n- **RHSA-2026:68280** · Red Hat · fixed in: Red Hat build of Keycloak 26.4.16 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68280)\n- **RHSA-2026:68278** · Red Hat · fixed in: Red Hat build of Keycloak 26.6.7 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68278)\n- **RHSA-2026:68277** · Red Hat · fixed in: Red Hat build of Keycloak 26.6 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68277)\n- **RHSA-2026:69296** · Red Hat · fixed in: Red Hat Data Grid 8.6.3 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69296)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}