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Product · socketio

engine.io

4 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

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  • High 7.5
    CVE-2026-59725

    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-…

    socketio engine.io engine.io npm
  • High 7.1
    CVE-2022-41940

    Uncaught exception in engine.io

    Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This …

    socketio engine.io engine.io npm
  • High 7.5
    CVE-2022-21676

    Uncaught Exception in engine.io

    Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This …

    socketio engine.io engine.io npm