CVE-2026-24733: Apache Tomcat

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

Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.

Affected products

• Apache Tomcat: from 9.0.1, before 9.0.113 (fixed in 9.0.113); from 10.1.1, before 10.1.50 (fixed in 10.1.50); from 11.0.1, before 11.0.15 (fixed in 11.0.15); version 9.0.0 only; version 10.0.0 only; version 11.0.0 only

Published 2026-02-17. Last modified 2026-06-17.