RHSA-2026:20405 - Security Advisory

Topic

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

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 this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• JBoss Enterprise Web Server 6 for RHEL 10 x86_64
• JBoss Enterprise Web Server 6 for RHEL 9 x86_64
• JBoss Enterprise Web Server 6 for RHEL 8 x86_64

Fixes

• BZ - 2457020 - CVE-2026-29146 Apache Tomcat: Apache Tomcat: Information disclosure via Padding Oracle vulnerability in EncryptInterceptor
• BZ - 2457037 - CVE-2026-29145 Apache Tomcat: Apache Tomcat: Authentication bypass due to CLIENT_CERT soft fail misconfiguration
• BZ - 2457038 - CVE-2026-34487 Apache Tomcat: Apache Tomcat: Information disclosure via sensitive data in log files
• BZ - 2457039 - CVE-2026-25854 Apache Tomcat: Apache Tomcat: Open Redirect vulnerability via LoadBalancerDrainingValve
• BZ - 2457040 - CVE-2026-24880 Apache Tomcat: Apache Tomcat: HTTP Request/Response Smuggling via invalid chunk extension
• BZ - 2457043 - CVE-2026-34500 Apache Tomcat: Apache Tomcat: Authentication bypass via client certificate misconfiguration
• BZ - 2457044 - CVE-2026-34483 Apache Tomcat: Apache Tomcat: Information disclosure due to improper encoding in JsonAccessLogValve

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