CVE-2026-24733— Apache Tomcat: Security constraint bypass with HTTP/0.9
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I. Basic Information for CVE-2026-24733
Vulnerability Information
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Vulnerability Title
Apache Tomcat: Security constraint bypass with HTTP/0.9
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Tomcat 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 11.0.14及之前版本、10.1.49及之前版本和9.0.112及之前版本存在输入验证错误漏洞，该漏洞源于未限制HTTP/0.9请求为GET方法，可能导致绕过针对GET请求的安全约束。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 ~ 11.0.14 | - |
II. Public POCs for CVE-2026-24733
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|---|
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Same Patch Batch · Apache Software Foundation · 2026-02-17 · 5 CVEs total
| CVE-2026-24734 | Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass | |
| CVE-2025-66614 | Apache Tomcat: Client certificate verification bypass due to virtual host mapping | |
| CVE-2026-25087 | Apache Arrow: Potential use-after-free when reading IPC file with pre-buffering | |
| CVE-2026-25903 | Apache NiFi: Missing Authorization of Restricted Permissions for Component Updates |
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Same vendor: Apache Software Foundation
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Same weakness: CWE-20
V. Comments for CVE-2026-24733
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