CVE-2024-23672: Apache Tomcat

Medium severity, CVSS 6.3. EPSS: 2.3% chance of exploitation in the next 30 days.

Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. It was possible for WebSocket clients to keep WebSocket connections open leading to increased resource consumption.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. 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.