{"id":"CVE-2026-59725","revision":"99780fffb2b048909d279edc8dbbe312","records":[{"revision":"99780fffb2b048909d279edc8dbbe312","observedAt":"2026-10-27T15:15:33.457+00:00","statement":{"source":"nvd","id":"CVE-2026-59725","aliases":[],"title":"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:…","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":"2026-07-08T16:16:33.133+00:00","modifiedAt":"2026-10-25T20:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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/commit/fc11285e14964c2132d122164bf130c355f60671","https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7","https://github.com/socketio/socket.io/security/advisories/GHSA-r635-g3xr-vw7x"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59725","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-404"],"productCriteria":["cpe:2.3:a:socket:engine.io:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-07-08T16:16:33.133","lastModified":"2026-10-25T20:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-59725","identifiers":["CVE-2026-59725"]},"retained":false,"historicalAffected":[]}],"coverage":[]}