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.
CVSS Details
- CVSS 3.1 Base Score: 3.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade tomcat-libUpgrade tomcat-docs-webappUpgrade tomcat-el-3.0-apiUpgrade tomcat-admin-webappsUpgrade tomcatUpgrade tomcat-el-2.2-apiUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsp-2.2-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-servlet-3.0-apiUpgrade tomcat-javadocUpgrade tomcat-jsvcUpgrade tomcat-webapps | May 20, 2026 | May 20, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 10.1.50Upgrade Apache Tomcat to 9.0.113Upgrade Apache Tomcat to 11.0.15Upgrade Apache Tomcat to the latest available version | Feb 18, 2026 | Feb 17, 2026 |
| Debian | — | Upgrade tomcat10Upgrade tomcat11Upgrade tomcat9 | Feb 19, 2026 | Feb 19, 2026 |
| Redhat_linux | — | Upgrade tomcat-webappsUpgrade tomcat-jsp-2.3-apiUpgrade jws6-tomcat-servlet-6.0-apiUpgrade tomcatUpgrade tomcat9-libUpgrade jws6-tomcat-libUpgrade tomcat-el-3.0-apiUpgrade tomcat9-docs-webappNo solution existsUpgrade tomcat9-admin-webappsUpgrade jws6-tomcat-jsp-3.1-apiUpgrade tomcat9-el-3.0-apiUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat-docs-webappUpgrade jws6-tomcat-docs-webappUpgrade jws6-tomcat-admin-webappsUpgrade tomcat9-webappsUpgrade tomcat-servlet-4.0-apiUpgrade jws6-tomcatUpgrade tomcat-libUpgrade jws6-tomcat-webappsUpgrade tomcat9-jsp-2.3-apiUpgrade jws6-tomcat-javadocUpgrade jws6-tomcat-el-5.0-apiUpgrade tomcat-admin-webappsUpgrade jws6-tomcat-selinuxUpgrade tomcat9 | May 4, 2026 | Feb 17, 2026 |
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