CVE-2026-24733
Last modified
CVE-2026-24733 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Apache | Tomcat | >= 9.0.1, < 9.0.113 | — |
| Apache | Tomcat | >= 10.1.1, < 10.1.50 | — |
| Apache | Tomcat | >= 11.0.1, < 11.0.15 | — |
| Apache | Tomcat | 9.0.0 | Milestone1 |
| Apache | Tomcat | 10.0.0 | Milestone1 |
| Apache | Tomcat | 11.0.0 | Milestone1 |
References
- https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90fMailing List, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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