vulnerability
Red Hat: CVE-2025-53506: tomcat: Apache Tomcat denial of service (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Jul 10, 2025 | Jul 14, 2025 | Jan 28, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Jul 10, 2025
Added
Jul 14, 2025
Modified
Jan 28, 2026
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.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
Solutions
no-fix-redhat-rpm-packageredhat-upgrade-tomcatredhat-upgrade-tomcat-admin-webappsredhat-upgrade-tomcat-docs-webappredhat-upgrade-tomcat-el-3-0-apiredhat-upgrade-tomcat-jsp-2-3-apiredhat-upgrade-tomcat-libredhat-upgrade-tomcat-servlet-4-0-apiredhat-upgrade-tomcat-webapps
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