CVE-2026-53434: Apache Tomcat

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M7 through 10.1.55, from 9.0.83 through 9.0.118. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fixes the issue.

Affected products

• Apache Tomcat: from 9.0.83, before 9.0.119 (fixed in 9.0.119); from 10.1.0, before 10.1.56 (fixed in 10.1.56); from 11.0.0, before 11.0.23 (fixed in 11.0.23)

Published 2026-06-29. Last modified 2026-07-02.