eap8-eap-product-conf-parent: Netty is an asynchronous, event-driven network application framework
CVE-2026-42578 is fixed in 9 products on 1 platform, first by libnetty-buffer-java 1:4.1.48-16ubuntu0.1~esm2, released May 13, 2026. It is not reported as exploited. Patch Radar priority: High.
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's HttpProxyHandler constructs HTTP CONNECT requests with header validation explicitly disabled. The newInitialMessage() method creates headers using DefaultHttpHeadersFactory.headersFactory().withValidation(false), then adds user-provided outboundHeaders without any CRLF validation. This allows an attacker who can influence the outbound headers to inject arbitrary HTTP headers into the CONNECT request sent to the proxy server. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| eap8-eap-product-conf-parent · RHEL 10 | 801.7.1-1.GA_redhat_00001.1.el10eap | RHSA-2026:49700 | Jun 12, 2026 |
| eap8-netty · RHEL 10 | 4.1.135-1.Final_redhat_00001.1.el10eap | RHSA-2026:49700 | Jun 12, 2026 |
| eap8-netty-transport-native-epoll · RHEL 10 | 4.1.135-1.Final_redhat_00001.1.el10eap | RHSA-2026:49700 | Jun 12, 2026 |
| eap8-wildfly · RHEL 10 | 8.1.7.1-1.GA_redhat_00004.1.el10eap | RHSA-2026:49700 | Jun 12, 2026 |
| libnetty-buffer-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-buffer-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| libnetty-common-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-common-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| libnetty-java · Ubuntu 18.04.6 LTS (bionic) | 1:4.1.7-4ubuntu0.1+esm6 | libnetty-java 1:4.1.7-4ubuntu0.1+esm6 | May 13, 2026 |
| libnetty-java · Ubuntu 20.04 LTS (focal) | 1:4.1.45-1ubuntu0.1~esm6 | libnetty-java 1:4.1.45-1ubuntu0.1~esm6 | May 13, 2026 |
| libnetty-java · Ubuntu 22.04.1 LTS (jammy) | 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | May 13, 2026 |
| libnetty-java · Ubuntu 24.04.5 LTS (noble) | 1:4.1.48-9ubuntu0.1+esm3 | libnetty-java 1:4.1.48-9ubuntu0.1+esm3 | May 13, 2026 |
| libnetty-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| netty · sles 15.7 | 4.1.133-150200.4.46.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
| netty-tcnative · sles 15.6 | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
| netty-tcnative · sles 15.7 | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
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