{"apiVersion":"1.0","identifier":"CVE-2026-62243","description":"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 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.","publishedAt":"2026-08-22T13:16:39","lastModifiedAt":"2026-08-24T20:16:52","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62243","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","epssProbability":0.00155,"riskScore":0.76,"affectedProduct":"Netty","affectedVersions":"cannotmatch","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-62243","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-62243","en":"https://www.redsauce.net/en/cves/CVE-2026-62243","fr":"https://www.redsauce.net/fr/cves/CVE-2026-62243","pt":"https://www.redsauce.net/pt/cves/CVE-2026-62243","de":"https://www.redsauce.net/de/cves/CVE-2026-62243","sk":"https://www.redsauce.net/sk/cves/CVE-2026-62243","el":"https://www.redsauce.net/el/cves/CVE-2026-62243"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-62243"}}