CVE-2003-0866: Apache Tomcat

Medium severity, CVSS 5.0. EPSS: 34.8% chance of exploitation in the next 30 days.

The Catalina org.apache.catalina.connector.http package in Tomcat 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service via several requests that do not follow the HTTP protocol, which causes Tomcat to reject later requests.

Affected products

• Apache Tomcat: version 4.0.0 only; version 4.0.1 only; version 4.0.2 only; version 4.0.3 only; version 4.0.4 only; version 4.0.5 only; …

Published 2003-11-17. Last modified 2026-06-16.