{"id":"CVE-2026-59724","revision":"f81cbbb543194b419bbb167718cace52","records":[{"revision":"f81cbbb543194b419bbb167718cace52","observedAt":"2026-10-25T14:19:22.811+00:00","statement":{"source":"nvd","id":"CVE-2026-59724","aliases":[],"title":"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 c…","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":"2026-07-08T16:16:32.98+00:00","modifiedAt":"2026-07-13T15:08:37.15+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/1fa1f46cd420ac5b57bb4c04c959b58f3c79158c","https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7","https://github.com/socketio/socket.io/security/advisories/GHSA-gr94-w7qr-f4j3"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59724","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-20","NVD-CWE-noinfo"],"productCriteria":["cpe:2.3:a:socket:engine.io:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-07-08T16:16:32.980","lastModified":"2026-07-13T15:08:37.150"},"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-2026-59724","identifiers":["CVE-2026-59724"]},"retained":false,"historicalAffected":[]}],"coverage":[]}