{"id":"CVE-2026-59724","revision":"9d06ab04ce9d4e309eadd313f3b409dc","records":[{"revision":"9d06ab04ce9d4e309eadd313f3b409dc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-59724","aliases":[],"title":"Socket.IO: Engine.IO WebTransport SID DoS","description":"Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as __proto__ through an inherited property of the clients object during WebTransport upgrade handling, causing a TypeError and denial of service. This issue is fixed in version 6.6.7.","state":0,"publishedAt":"2026-07-08T15:35:39.813+00:00","modifiedAt":"2026-07-08T19:41:18.905+00:00","affected":[{"ecosystem":"Vendor product","name":"socket.io","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"socketio\",\n                    \"product\": \"socket.io\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 6.5.0, < 6.6.7\",\n                            \"status\": \"affected\"\n                        }\n                    ]\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"}],"references":["https://github.com/socketio/socket.io/security/advisories/GHSA-gr94-w7qr-f4j3","https://github.com/socketio/socket.io/commit/1fa1f46cd420ac5b57bb4c04c959b58f3c79158c","https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-59724","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-59724","identifiers":["CVE-2026-59724"]},"retained":false,"historicalAffected":[]}],"coverage":[]}