References to Advisories, Solutions, and Tools

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Change History

{"timestamp":"2026-07-08T17:58:43.578991Z","id":"CVE-2026-59724","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

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.

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-20

https://github.com/socketio/socket.io/commit/1fa1f46cd420ac5b57bb4c04c959b58f3c79158c

https://github.com/socketio/socket.io/releases/tag/[email protected]

https://github.com/socketio/socket.io/security/advisories/GHSA-gr94-w7qr-f4j3

[{"vendor":"socketio","product":"socket.io","versions":[{"version":">= 6.5.0, < 6.6.7","status":"affected"}]}]