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CVE-2026-24733 Improper Input Validation vulnerability in Apache Tomcat
Description
Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. 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. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Tomcat 11.0 | 11.0.0-M1 → 11.0.14 | No fix stated |
| Apache Tomcat 10.1 | 10.1.0-M1 → 10.1.49 | No fix stated |
| Apache Tomcat 9.0 | 9.0.0.M1 → 9.0.112 | No fix stated |
| Apache Tomcat 8.5 | earliest → 8.5.100 | No fix stated |
References
- lists.apache.org lists.apache.org
Timeline
- Published
- Last modified
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