CVE-2024-24549: Apache Tomcat

High severity, CVSS 7.5. EPSS: 23.1% chance of exploitation in the next 30 days.

Denial of Service due to improper input validation vulnerability for HTTP/2 requests in Apache Tomcat. When processing an HTTP/2 request, if the request exceeded any of the configured limits for headers, the associated HTTP/2 stream was not reset until after all of the headers had been processed.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.

Affected products

• Apache Tomcat: from 8.5.0, before 8.5.99 (fixed in 8.5.99); from 9.0.0, before 9.0.86 (fixed in 9.0.86); from 10.1.0, before 10.1.19 (fixed in 10.1.19); version 11.0.0 only
• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 39 only; version 40 only

Published 2024-03-13. Last modified 2026-06-17.