GHSA-fccv-jmmp-qg76HighCVSS 7.5

Apache Tomcat Improper Input Validation vulnerability

Published
November 28, 2023
Last Modified
October 2, 2026

🔗 CVE IDs covered (1)

📋 Description

Improper Input Validation vulnerability in Apache Tomcat. Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82, and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.0-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.

🎯 Affected products9

  • maven/org.apache.tomcat:tomcat-catalina:>= 11.0.0-M1, < 11.0.0-M11
  • maven/org.apache.tomcat:tomcat-catalina:>= 10.1.0-M1, < 10.1.16
  • maven/org.apache.tomcat:tomcat-catalina:>= 9.0.0-M1, < 9.0.83
  • maven/org.apache.tomcat:tomcat-catalina:>= 8.5.0, < 8.5.96
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 11.0.0-M1, < 11.0.0-M11
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 10.1.0-M1, < 10.1.16
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 9.0.0-M1, < 9.0.83
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 8.5.0, < 8.5.96
  • maven/org.apache.tomcat:tomcat-coyote:>= 11.0.0-M1, < 11.0.0-M11

🔗 References (15)