PT-2026-79546 · Netty · Netty
CVSS v4.0
8.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
Netty (io.netty:netty-handler) versions 4.2.0.Final through 4.2.16.Final
Netty (io.netty:netty-handler) versions prior to 4.1.137.Final
Description
TLS hostname verification is disabled on the
SslProvider.OPENSSL client path when a plain (non-extended) X509TrustManager is used and Unsafe-based trust-manager wrapping is unavailable, specifically in Java 25+. This allows a man-in-the-middle attacker to present a certificate issued for a different hostname that is accepted without validation.Recommendations
Update Netty (io.netty:netty-handler) versions 4.2.0.Final through 4.2.16.Final to version 4.2.17.Final.
Update Netty (io.netty:netty-handler) versions prior to 4.1.137.Final to version 4.1.137.Final.
Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Netty