Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host and the TLS configuration for one of those hosts did not require client certificate authentication but another one did, it was possible for a client to bypass the client certificate authentication by sending different host names in the SNI extension and the HTTP host header field. The vulnerability only applies if client certificate authentication is only enforced at the Connector. It does not apply if client certificate authentication is enforced at the web application. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue.
This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.1, 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 confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 1 product from apache organizations running these solutions should prioritize assessment and patching.
Reported in 2026, 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.
2026-02-17T19:21:55.310
2026-03-11T16:16:20.410
Modified
CVSSv3.1: 9.1 (CRITICAL)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | apache | tomcat | < 9.0.113 | Yes |
| Application | apache | tomcat | < 10.1.50 | Yes |
| Application | apache | tomcat | < 11.0.15 | 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 |
| 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 |
| 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 |
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.