CVE-2026-62243
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 SslPr…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Netty (Io.Netty:Netty-Handler) Versions From 4.2.0.Final | through 4.2.16.Final |
| Versions | through 4.1.136.Final |
Versions were read from the advisory text. No structured product data has been published for this record yet.