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CVE-2026-59725

Socket.IO: Engine.IO Polling Transport Connection Exhaustion PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
socketio / engine.ioaffected >= 4.1.0, < 6.6.7

CWE

CWE-404

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.