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CVE-2026-59724

Socket.IO: Engine.IO WebTransport SID DoS PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
socketio / socket.ioaffected >= 6.5.0, < 6.6.7

CWE

CWE-20

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.