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. 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.
2023-10-10T19:15:09.690
2025-06-16T17:15:27.480
Modified
CVSSv3.1: 5.3 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | apache | tomcat | < 8.5.94 | Yes |
| Application | apache | tomcat | < 9.0.81 | Yes |
| Application | apache | tomcat | < 10.1.14 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 9.0.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 10.1.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Application | apache | tomcat | 11.0.0 | Yes |
| Operating System | debian | debian_linux | 10.0 | Yes |
| Operating System | debian | debian_linux | 11.0 | Yes |
| Operating System | debian | debian_linux | 12.0 | Yes |