CVE-2026-43514: Apache Tomcat

Low severity, CVSS 3.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Affected products

• Apache Tomcat: from 7.0.0, up to and including 7.0.109; from 8.5.0, up to and including 8.5.100; from 9.0.0, before 9.0.118 (fixed in 9.0.118); from 10.1.0, before 10.1.55 (fixed in 10.1.55); from 11.0.0, before 11.0.22 (fixed in 11.0.22)

Published 2026-05-12. Last modified 2026-06-17.