Description
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.
Problem types
CWE-400 Uncontrolled Resource Consumption
Product status
11.0.0-M1 (semver)
10.1.0-M1 (semver)
9.0.0.M1 (semver)
8.5.0 (semver)
10.0.0-M1 (semver)
Credits
Kanatoko
References
lists.debian.org/debian-lts-announce/2025/07/msg00009.html
www.openwall.com/lists/oss-security/2025/07/10/13
lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0