CVE-2025-53506

HIGH

Apache Tomcat <11.0.9, <10.1.43, <9.0.107 - Uncontrolled Resource C...

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0125
EPSS Percentile 79.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (3)
apache/tomcat 9.0.0 - 9.0.106
org.apache.tomcat/tomcat-coyote 11.0.0-M1 - 11.0.9Maven
org.apache.tomcat.embed/tomcat-embed-core 8.5.0Maven
Published Jul 10, 2025
Tracked Since Feb 18, 2026