{"id":86618,"date":"2026-03-06T03:39:39","date_gmt":"2026-03-06T03:39:39","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-53506-uncontrolled-resource-consumption-vulnerability-in-apache-tomcat","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53506-uncontrolled-resource-consumption-vulnerability-in-apache-tomcat\/","title":{"rendered":"CVE-2025-53506: Uncontrolled Resource Consumption Vulnerability in Apache Tomcat<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

This report delves into the details of a significant vulnerability identified in Apache Tomcat, an open-source Java Servlet container developed by the Apache Software Foundation. The vulnerability, designated as CVE-2025-53506, represents a serious risk to servers running the affected versions of Apache Tomcat. If exploited, this flaw could lead to uncontrolled resource consumption, potentially leading to system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-53506
\nSeverity: High (7.5 CVSS score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Apache Tomcat | 11.0.0-M1 through 11.0.8
\nApache Tomcat | 10.1.0-M1 through 10.1.42
\nApache Tomcat | 9.0.0.M1 through 9.0.106<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability exploits a flaw in Apache Tomcat’s handling of HTTP\/2 clients. If an HTTP\/2 client does not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams, it can lead to uncontrolled resource consumption. This can cause the server to become overwhelmed and potentially lead to system compromise or data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here’s a concept of how this vulnerability might be exploited:<\/p>\n

POST \/ HTTP\/2.0\nHost: vulnerable.example.com\n:method: POST\n:path: \/\n:scheme: https\n:authority: vulnerable.example.com\ncontent-length: 1000000000\n{ \"malicious_payload\": \"Repeatedly send large amounts of data without acknowledging initial settings frame.\" }<\/code><\/pre>\n
This conceptual exploit demonstrates the malicious client repeatedly sending large amounts of data without acknowledging the initial settings frame, leading to uncontrolled resource consumption on the server.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview This report delves into the details of a significant vulnerability identified in Apache Tomcat, an open-source Java Servlet container developed by the Apache Software Foundation. The vulnerability, designated as CVE-2025-53506, represents a serious risk to servers running the affected versions of Apache Tomcat. If exploited, this flaw could lead to uncontrolled resource consumption, potentially […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86618","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t