CVE-2026-34500: Apache Tomcat: CLIENT_CERT authentication does not fail as expected

April 9, 2026 (updated April 10, 2026)

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116.

Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.

References

github.com/advisories/GHSA-24j9-x2wg-9qv6
github.com/apache/tomcat
lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2
nvd.nist.gov/vuln/detail/CVE-2026-34500

Code Behaviors & Features

Detect and mitigate CVE-2026-34500 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →