Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. 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. Other EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tomcat-jsp-2.3-apiUpgrade tomcat-webappsUpgrade tomcat-admin-webappsUpgrade tomcatUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-el-3.0-apiUpgrade tomcat-docs-webappUpgrade tomcat-lib | Aug 22, 2025 | Aug 20, 2025 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-webappsUpgrade tomcat-libUpgrade tomcat-jsvcUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-admin-webappsUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-el-3.0-apiUpgrade tomcat | May 20, 2026 | May 20, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 10.1.43Upgrade Apache Tomcat to 11.0.9Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 9.0.107 | Jul 10, 2025 | Jul 10, 2025 |
| Atlassian Bitbucket | — | Upgrade Atlassian Bitbucket to the latest version | Aug 20, 2025 | Aug 19, 2025 |
| Atlassian Jira | — | Upgrade to the latest version of Atlassian JIRA | Sep 17, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade tomcat10Upgrade tomcat11Upgrade tomcat9 | Jul 14, 2025 | Jul 10, 2025 |
| Freebsd | — | Upgrade tomcat110Upgrade tomcat101Upgrade tomcat9 | Jul 12, 2025 | Jul 10, 2025 |
| Oracle_linux | — | Upgrade tomcat-jsp-2.3-apiUpgrade tomcat9Upgrade tomcat-el-3.0-apiUpgrade tomcat9-webappsUpgrade tomcat-webappsUpgrade tomcat-jsp-3.1-apiUpgrade tomcat-servlet-6.0-apiUpgrade tomcat-admin-webappsUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat9-libUpgrade tomcatUpgrade tomcat9-el-3.0-apiUpgrade tomcat-libUpgrade tomcat9-docs-webappUpgrade tomcat9-jsp-2.3-apiUpgrade tomcat9-admin-webappsUpgrade tomcat-el-5.0-apiUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-api | Aug 21, 2025 | Jul 10, 2025 |
| Redhat_linux | — | Upgrade tomcatUpgrade jws6-tomcat-jsp-3.1-apiUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat9-libUpgrade jws6-tomcat-libUpgrade tomcat-admin-webappsUpgrade tomcat9-webappsUpgrade tomcat-servlet-4.0-apiUpgrade jws6-tomcat-admin-webappsUpgrade jws6-tomcat-el-5.0-apiUpgrade tomcat-jsp-3.1-apiUpgrade tomcat9-docs-webappUpgrade tomcat-jsp-2.3-apiNo solution existsUpgrade jws6-tomcat-selinuxUpgrade tomcat-docs-webappUpgrade tomcat-el-3.0-apiUpgrade tomcat-servlet-6.0-apiUpgrade tomcat-webappsUpgrade tomcat9Upgrade tomcat9-el-3.0-apiUpgrade jws6-tomcat-webappsUpgrade tomcat-libUpgrade jws6-tomcatUpgrade tomcat9-jsp-2.3-apiUpgrade jws6-tomcat-servlet-6.0-apiUpgrade tomcat-el-5.0-apiUpgrade jws6-tomcat-docs-webappUpgrade tomcat9-admin-webappsUpgrade jws6-tomcat-javadoc | Jul 14, 2025 | Jul 10, 2025 |
| Suse | — | Upgrade tomcat-embedUpgrade tomcat11-servlet-6_1-apiUpgrade tomcat10-libUpgrade tomcat10-servlet-6_0-apiUpgrade tomcat11-jsp-4_0-apiUpgrade tomcat10-admin-webappsUpgrade tomcat11-docs-webappUpgrade tomcat10-docUpgrade tomcat11-webappsUpgrade tomcat-admin-webappsUpgrade tomcat10-embedUpgrade tomcat11-libUpgrade tomcat11Upgrade tomcat-javadocUpgrade tomcat-libUpgrade tomcat11-admin-webappsUpgrade tomcat11-docUpgrade tomcat-jsp-2_3-apiUpgrade tomcat-el-3_0-apiUpgrade tomcat10-webappsUpgrade tomcat11-el-6_0-apiUpgrade tomcat-servlet-4_0-apiUpgrade tomcat11-embedUpgrade tomcat10-jsp-3_1-apiUpgrade tomcat-docs-webappUpgrade tomcat11-jsvcUpgrade tomcatUpgrade tomcat10-el-5_0-apiUpgrade tomcat10-jsvcUpgrade tomcat10-docs-webappUpgrade tomcat-jsvcUpgrade tomcat-webappsUpgrade tomcat10 | Dec 5, 2025 | Aug 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 6, 2025 | Jul 10, 2025 |
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