{"id":"CVE-2026-59725","revision":"6db71f4e38ff46ccb0b2ceee46c96dd0","records":[{"revision":"6db71f4e38ff46ccb0b2ceee46c96dd0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-59725","aliases":[],"title":"Socket.IO: Engine.IO Polling Transport Connection Exhaustion","description":"Socket.IO enables bidirectional and low-latency communication for every platform. From 4.1.0 before 6.6.7, Engine.IO protocol v4 polling transport does not properly close the HTTP response for invalid binary POST requests with Content-Type: application/octet-stream, allowing an unauthenticated attacker to exhaust server-side connections and sockets. This issue is fixed in version 6.6.7.","state":0,"publishedAt":"2026-07-08T15:37:52.293+00:00","modifiedAt":"2026-10-14T18:46:37.137+00:00","affected":[{"ecosystem":"Vendor product","name":"engine.io","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"socketio\",\n                    \"product\": \"engine.io\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.1.0, < 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-r635-g3xr-vw7x","https://github.com/socketio/socket.io/commit/fc11285e14964c2132d122164bf130c355f60671","https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-59725","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-59725","identifiers":["CVE-2026-59725"]},"retained":false,"historicalAffected":[]}],"coverage":[]}