GHSA-r6j3-px5g-cq3xMediumCVSS 5.3

Apache Tomcat Improper Input Validation vulnerability

Published
October 10, 2023
Last Modified
June 12, 2026

🔗 CVE IDs covered (1)

CVE-2023-45648 →

📋 Description

Improper Input Validation vulnerability in Apache Tomcat.

Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header 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-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.

🎯 Affected products12

  • maven/org.apache.tomcat:tomcat:>= 11.0.0-M1, < 11.0.0-M12
  • maven/org.apache.tomcat:tomcat:>= 10.1.0-M1, < 10.1.14
  • maven/org.apache.tomcat:tomcat:>= 9.0.0-M1, < 9.0.81
  • maven/org.apache.tomcat:tomcat:>= 8.5.0, < 8.5.94
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 11.0.0-M1, < 11.0.0-M12
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 10.1.0-M1, < 10.1.14
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 9.0.0-M1, < 9.0.81
  • maven/org.apache.tomcat.embed:tomcat-embed-core:>= 8.5.0, < 8.5.94
  • maven/org.apache.tomcat:tomcat-coyote:>= 11.0.0-M1, < 11.0.0-M12
  • maven/org.apache.tomcat:tomcat-coyote:>= 10.1.0-M1, < 10.1.14
  • maven/org.apache.tomcat:tomcat-coyote:>= 9.0.0-M1, < 9.0.81
  • maven/org.apache.tomcat:tomcat-coyote:>= 8.5.0, < 8.5.94

🔗 References (12)