PT-2026-48902 · Netty · Netty

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-50010

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SimpleTrustManagerFactory.engineGetTrustManagers() and related paths wrap any user-supplied plain X509TrustManager in X509TrustManagerWrapper, which extends X509ExtendedTrustManager but implements the 3-arg checkServerTrusted(chain, authType, SSLEngine) by discarding the SSLEngine and calling the 2-arg delegate. Because the object now IS an X509ExtendedTrustManager, neither SunJSSE's internal AbstractTrustManagerWrapper nor Netty's own OpenSslX509TrustManagerWrapper will re-wrap it to add endpoint-identification. Consequently, even though Netty 4.2 sets endpointIdentificationAlgorithm="HTTPS" by default, a client built with SslContextBuilder.forClient().trustManager(somePlainX509TrustManager) performs no hostname verification at all. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-50010

Affected Products

Netty

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-50010 · Security Note
• https://github.com/netty/netty/releases/tag/netty-4.1.135.Final · Note
• https://github.com/netty/netty/releases/tag/netty-4.2.15.Final · Note
• https://github.com/netty/netty/security/advisories/GHSA-c653-97m9-rcg9 · Note