{"schema_version":"1.7.3","id":"GHSA-25xr-qj8w-c4vf","published":"2025-07-10T21:31:53Z","modified":"2026-03-06T21:48:52.680071Z","aliases":["BIT-tomcat-2025-53506","CVE-2025-53506"],"related":["CGA-37ch-cv83-jr47"],"summary":"Apache Tomcat Coyote vulnerable to Denial of Service via excessive HTTP/2 streams","details":"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.\n\nThis 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.\n\nUsers are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.","affected":[{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-M1"},{"fixed":"11.0.9"}]}],"versions":["11.0.0","11.0.0-M1","11.0.0-M10","11.0.0-M11","11.0.0-M12","11.0.0-M13","11.0.0-M14","11.0.0-M15","11.0.0-M16","11.0.0-M17","11.0.0-M18","11.0.0-M19","11.0.0-M20","11.0.0-M21","11.0.0-M22","11.0.0-M24","11.0.0-M25","11.0.0-M26","11.0.0-M3","11.0.0-M4","11.0.0-M5","11.0.0-M6","11.0.0-M7","11.0.0-M9","11.0.1","11.0.2","11.0.3","11.0.4","11.0.5","11.0.6","11.0.7","11.0.8"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-25xr-qj8w-c4vf/GHSA-25xr-qj8w-c4vf.json"}},{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.1.0-M1"},{"fixed":"10.1.43"}]}],"versions":["10.1.0","10.1.0-M1","10.1.0-M10","10.1.0-M11","10.1.0-M12","10.1.0-M14","10.1.0-M15","10.1.0-M16","10.1.0-M17","10.1.0-M2","10.1.0-M4","10.1.0-M5","10.1.0-M6","10.1.0-M7","10.1.0-M8","10.1.1","10.1.10","10.1.11","10.1.12","10.1.13","10.1.14","10.1.15","10.1.16","10.1.17","10.1.18","10.1.19","10.1.2","10.1.20","10.1.23","10.1.24","10.1.25","10.1.26","10.1.28","10.1.29","10.1.30","10.1.31","10.1.33","10.1.34","10.1.35","10.1.36","10.1.39","10.1.4","10.1.40","10.1.41","10.1.42","10.1.5","10.1.6","10.1.7","10.1.8","10.1.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-25xr-qj8w-c4vf/GHSA-25xr-qj8w-c4vf.json"}},{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0.M1"},{"fixed":"9.0.107"}]}],"versions":["9.0.0.M1","9.0.0.M10","9.0.0.M11","9.0.0.M13","9.0.0.M15","9.0.0.M17","9.0.0.M18","9.0.0.M19","9.0.0.M20","9.0.0.M21","9.0.0.M22","9.0.0.M25","9.0.0.M26","9.0.0.M27","9.0.0.M3","9.0.0.M4","9.0.0.M6","9.0.0.M8","9.0.0.M9","9.0.1","9.0.10","9.0.100","9.0.102","9.0.104","9.0.105","9.0.106","9.0.11","9.0.12","9.0.13","9.0.14","9.0.16","9.0.17","9.0.19","9.0.2","9.0.20","9.0.21","9.0.22","9.0.24","9.0.26","9.0.27","9.0.29","9.0.30","9.0.31","9.0.33","9.0.34","9.0.35","9.0.36","9.0.37","9.0.38","9.0.39","9.0.4","9.0.40","9.0.41","9.0.43","9.0.44","9.0.45","9.0.46","9.0.48","9.0.5","9.0.50","9.0.52","9.0.53","9.0.54","9.0.55","9.0.56","9.0.58","9.0.59","9.0.6","9.0.60","9.0.62","9.0.63","9.0.64","9.0.65","9.0.67","9.0.68","9.0.69","9.0.7","9.0.70","9.0.71","9.0.72","9.0.73","9.0.74","9.0.75","9.0.76","9.0.78","9.0.79","9.0.8","9.0.80","9.0.81","9.0.82","9.0.83","9.0.84","9.0.85","9.0.86","9.0.87","9.0.88","9.0.89","9.0.90","9.0.91","9.0.93","9.0.94","9.0.95","9.0.96","9.0.97","9.0.98","9.0.99"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-25xr-qj8w-c4vf/GHSA-25xr-qj8w-c4vf.json"}},{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.0"},{"last_affected":"8.5.100"}]}],"versions":["8.5.0","8.5.100","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.19","8.5.2","8.5.20","8.5.21","8.5.23","8.5.24","8.5.27","8.5.28","8.5.29","8.5.3","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.37","8.5.38","8.5.39","8.5.4","8.5.40","8.5.41","8.5.42","8.5.43","8.5.45","8.5.46","8.5.47","8.5.49","8.5.5","8.5.50","8.5.51","8.5.53","8.5.54","8.5.55","8.5.56","8.5.57","8.5.58","8.5.59","8.5.6","8.5.60","8.5.61","8.5.63","8.5.64","8.5.65","8.5.66","8.5.68","8.5.69","8.5.70","8.5.71","8.5.72","8.5.73","8.5.75","8.5.76","8.5.77","8.5.78","8.5.79","8.5.8","8.5.81","8.5.82","8.5.83","8.5.84","8.5.85","8.5.86","8.5.87","8.5.88","8.5.89","8.5.9","8.5.90","8.5.91","8.5.92","8.5.93","8.5.94","8.5.95","8.5.96","8.5.97","8.5.98","8.5.99"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-25xr-qj8w-c4vf/GHSA-25xr-qj8w-c4vf.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.0"},{"last_affected":"8.5.100"}]}],"versions":["8.5.0","8.5.100","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.19","8.5.2","8.5.20","8.5.21","8.5.23","8.5.24","8.5.27","8.5.28","8.5.29","8.5.3","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.37","8.5.38","8.5.39","8.5.4","8.5.40","8.5.41","8.5.42","8.5.43","8.5.45","8.5.46","8.5.47","8.5.49","8.5.5","8.5.50","8.5.51","8.5.53","8.5.54","8.5.55","8.5.56","8.5.57","8.5.58","8.5.59","8.5.6","8.5.60","8.5.61","8.5.63","8.5.64","8.5.65","8.5.66","8.5.68","8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