CVE Intelligence

Socketio Engine.io vulnerabilities

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Published CVEs affecting Socketio Engine.io: 1 record(s), with affected versions and fixes.

CVE-2026-59725 High · 7.5 CWE-404 Jul 8, 2026
Socket.IO: Engine.IO Polling Transport Connection Exhaustion
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.