RHSA-2026:67164 - Security Advisory

Topic

An update for tomcat is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.

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

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

Security Fix(es):

• Apache Tomcat: Apache Tomcat: Improper Input Validation vulnerability due to incomplete fix (CVE-2026-32990)
• tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)
• tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)
• tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication. (CVE-2026-42498)
• tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)
• tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)
• tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration (CVE-2026-55957)

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

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64

Fixes

• BZ - 2457025 - CVE-2026-32990 Apache Tomcat: Apache Tomcat: Improper Input Validation vulnerability due to incomplete fix
• BZ - 2476511 - CVE-2026-43512 tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication
• 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 - 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 - 2494669 - CVE-2026-55957 tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration

CVEs

• CVE-2026-32990
• CVE-2026-41293
• CVE-2026-42498
• CVE-2026-43512
• CVE-2026-43513
• CVE-2026-43515
• CVE-2026-55957

References

• https://access.redhat.com/security/updates/classification/#important