WebSocket connection drops with Cloudflare proxy

resolved Vaultwarden networking Reported 2026-01-20 Verified 2026-03-01

Real-time sync stops working when Vaultwarden is behind Cloudflare proxy due to WebSocket timeout defaults.

Error Messages

WebSocket connection closed1006 abnormal closure

Resolutions (1)

high confidence 31 verified

Enable WebSockets in Cloudflare dashboard and set the environment variable:

WEBSOCKET_ENABLED=true

In Cloudflare: Network tab > WebSockets > On. Also set proxy_read_timeout 3600s in your reverse proxy config.

Verified by 31 users Added 2026-01-25

Applies to: 1.32 on docker