Issued:

2026-05-26

Updated:

2026-05-26

RHSA-2026:20406 - Important: Red Hat JBoss Web Server 6.2.3 release and security update

Synopsis

Important: Red Hat JBoss Web Server 6.2.3 release and security update

Type/Severity

Security Advisory Important

Topic

Red Hat JBoss Web Server 6.2.3 zip release is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10, and Windows Server.

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 Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector (mod_cluster), the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library.

This release of Red Hat JBoss Web Server 6.2.3 serves as a replacement for Red Hat JBoss Web Server 6.2.2. This release includes bug fixes, enhancements and component upgrades, which are documented in the Release Notes that are linked to in the References section.

Security Fix(es):

• tomcat: Apache Tomcat: HTTP Request/Response Smuggling via invalid chunk extension (CVE-2026-24880)
• tomcat: Apache Tomcat: Open Redirect vulnerability via LoadBalancerDrainingValve (CVE-2026-25854)
• tomcat: Apache Tomcat: Authentication bypass due to CLIENT_CERT soft fail misconfiguration (CVE-2026-29145)
• tomcat: Apache Tomcat: Information disclosure via Padding Oracle vulnerability in EncryptInterceptor (CVE-2026-29146)
• tomcat: Apache Tomcat: Information disclosure due to improper encoding in JsonAccessLogValve (CVE-2026-34483)
• tomcat: Apache Tomcat: Information disclosure via sensitive data in log files (CVE-2026-34487)
• tomcat: Apache Tomcat: Authentication bypass via client certificate misconfiguration (CVE-2026-34500)

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, back up your existing Red Hat JBoss Web Server installation, including all applications and configuration files.

The References section of this erratum contains a download link for the update. You must be logged in to download the update.

Affected Products

Fixes

• This content is not included.BZ - 2457020
• This content is not included.BZ - 2457037
• This content is not included.BZ - 2457038
• This content is not included.BZ - 2457039
• This content is not included.BZ - 2457040
• This content is not included.BZ - 2457043
• This content is not included.BZ - 2457044

CVEs

• CVE-2026-24880
• CVE-2026-25854
• CVE-2026-29145
• CVE-2026-29146
• CVE-2026-34483
• CVE-2026-34487
• CVE-2026-34500

References

• https://access.redhat.com/security/updates/classification/#important
• https://docs.redhat.com/en/documentation/red_hat_jboss_web_server/6.2/html/red_hat_jboss_web_server_6.2_service_pack_3_release_notes/index

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.