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CVE-2026-2229 undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation

🗓️ 12 Mar 2026 20:27:05Reported by GoogleType 
osv
 osv🔗 osv.dev👁 4 Views

CVE-2026-2229: Undici WebSocket client crashes from out-of-range server maximum window in permessage-deflate.

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16 Jul 2026 03:31Current
7High risk
Vulners AI Score7
CVSS 3.17.5
EPSS0.00874
undici websocketpermessage deflateserver maximum windowout of rangewindow bits rangeunhandled errorrange error
4