CVE-2026-65637: Apache Tomcat

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Affected products

• Apache Tomcat: from 9.0.115, before 9.0.121 (fixed in 9.0.121); from 10.1.53, before 10.1.58 (fixed in 10.1.58); from 11.0.20, before 11.0.25 (fixed in 11.0.25)

Published 2026-08-25. Last modified 2026-08-27.