RHSA-2026:43401 - Security Advisory

Topic

Red Hat JBoss Web Server 6.2.4 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 6.2.4 serves as a replacement for Red Hat JBoss Web Server 6.2.3. 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-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)
• tomcat-coyote: Apache Tomcat: Information disclosure via AJP secret timing discrepancy (CVE-2026-43514)
• tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)
• tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)
• tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)
• tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication (CVE-2026-42498)
• tomcat-catalina: Apache Tomcat: Denial of Service due to uncontrolled resource allocation (CVE-2026-41284)
• tomcat-catalina: Apache Tomcat: Incorrect control flow in rewrite valve allows unexpected rule processing (CVE-2026-53404)
• tomcat-catalina: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass (CVE-2026-55956)

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 - 2476511 - CVE-2026-43512 tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication
• BZ - 2476512 - CVE-2026-43514 tomcat-coyote: Apache Tomcat: Information disclosure via AJP secret timing discrepancy
• BZ - 2476513 - CVE-2026-41293 tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated
• BZ - 2476516 - CVE-2026-42498 tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication.
• BZ - 2476518 - CVE-2026-41284 tomcat: Apache Tomcat: Denial of Service due to uncontrolled resource allocation
• BZ - 2476519 - CVE-2026-43515 tomcat-coyote: tomcat: Improper Authorization allows security bypass
• BZ - 2476520 - CVE-2026-43513 tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm
• BZ - 2494676 - CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
• BZ - 2494681 - CVE-2026-53404 Apache Tomcat: Apache Tomcat: Incorrect control flow in rewrite valve allows unexpected rule processing

CVEs

• CVE-2026-41284
• CVE-2026-41293
• CVE-2026-42498
• CVE-2026-43512
• CVE-2026-43513
• CVE-2026-43514
• CVE-2026-43515
• CVE-2026-53404
• CVE-2026-55956

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_4_release_notes/index