CVE-2026-59725: Socket.IO: Engine.IO Polling Transport Connection Exhaustion
socketio · engine.io
Affected: socketio engine.io · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 51% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- socketio · engine.io>= 4.1.0, < 6.6.7
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-59725 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.