CVE-2026-24734: Apache Tomcat

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native:  from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

Affected products

• Apache Tomcat: from 9.0.83, before 9.0.115 (fixed in 9.0.115); from 10.1.1, before 10.1.52 (fixed in 10.1.52); from 11.0.1, before 11.0.18 (fixed in 11.0.18); version 10.1.0 only; version 11.0.0 only
• Apache Tomcat Native: from 1.3.0, before 1.3.5 (fixed in 1.3.5); from 2.0.0, before 2.0.12 (fixed in 2.0.12)

Published 2026-02-17. Last modified 2026-07-15.