The Quarterly Threat Landscape Report is out. See what attackers are targeting now.Read report
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade tomcat-jsvcUpgrade tomcatUpgrade tomcat-el-3.0-apiUpgrade tomcat-libUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-admin-webappsUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-webapps | Oct 19, 2026 | Oct 19, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 9.0.122Upgrade Apache Tomcat to 11.0.26Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 10.1.60 | Sep 24, 2026 | Sep 23, 2026 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Oct 12, 2026 | Oct 8, 2026 |
| Redhat_linux | — | No solution exists | Oct 1, 2026 | Sep 23, 2026 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub