RHSA-2026:49701 - Security Advisory

Topic

A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Red Hat JBoss Enterprise Application Platform 8 is a platform for Java applications based on the WildFly application runtime.

This asynchronous patch is an update for Red Hat JBoss Enterprise Application Platform 8.1. See Release Notes for information about the most significant bug fixes and enhancements included in this release.

Security Fix(es):

• netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
• netty-resolver-dns: Netty: Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
• netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
• netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
• netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

Before applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

Affected Products

• JBoss Enterprise Application Platform Text-Only Advisories x86_64

Fixes

• BZ - 2488081 - CVE-2026-44249 netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation
• BZ - 2488391 - CVE-2026-45416 netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake
• BZ - 2488400 - CVE-2026-45674 netty-resolver-dns: Netty: Information disclosure and data manipulation due to improper CNAME record validation
• BZ - 2488429 - CVE-2026-50010 netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass
• BZ - 2488439 - CVE-2026-47691 io.netty/netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records
• JBEAP-33514 - (8.1.z) Upgrade netty from 4.1.133.Final-redhat-00001 to 4.1.135.Final-redhat-00001
• JBEAP-33903 - (8.1.z) Update EAP channel to use wildfly-ee-feature-pack-product-conf x.x.x in EAP 8.1 Update 7.1

CVEs

• CVE-2026-44249
• CVE-2026-45416
• CVE-2026-45674
• CVE-2026-47691
• CVE-2026-50010

References

• https://access.redhat.com/security/updates/classification/#important
• https://docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.1
• https://docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.1/html/release_notes_for_red_hat_jboss_enterprise_application_platform_8.1/index
• https://access.redhat.com/articles/7129481