{"id":"CVE-2026-16756","revision":"b624f1492e6e43b5a514ed683ecec3c2","records":[{"revision":"b624f1492e6e43b5a514ed683ecec3c2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-16756","aliases":[],"title":"Allocation of resources without limits in the default aws-smithy-http-server serve() path allows unauthenticated Slowloris denial of service","description":"Missing connection and header-read timeouts and the absence of a concurrent-connection cap in the default serve() path of Amazon aws-smithy-http-server might allow remote attackers to cause a denial of service by opening many connections and sending partial requests that are never completed, exhausting server sockets and tasks.\n\n\n\nTo mitigate this issue, users should upgrade to aws-smithy-http-server 0.66.5 or later.","state":0,"publishedAt":"2026-07-23T18:32:53.792+00:00","modifiedAt":"2026-08-12T19:03:13.246+00:00","affected":[{"ecosystem":"Vendor product","name":"aws-smithy-http-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"AWS\",\n                    \"product\": \"aws-smithy-http-server\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.66.4\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"},{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"}],"references":["https://crates.io/crates/aws-smithy-http-server/0.66.5","https://aws.amazon.com/security/security-bulletins/2026-064-aws/","https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-jvxp-qmx7-gjpx"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16756","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-16756","identifiers":["CVE-2026-16756"]},"retained":false,"historicalAffected":[]}],"coverage":[]}