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.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 2 products from apache, from debian organizations running these solutions should prioritize assessment and patching.
Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2023-10-10T19:15:09.690
2025-08-07T11:15:27.957
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 |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For apache's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.