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Improvement2026.8.1290.1

Cloudflare One Client for Windows 2026.8.1290.1 Beta

Beta release includes routing improvements for non-RFC 1918 networks, enhanced DNS reliability on low-MTU connections, improved API retry logic, and numerous stability fixes including fixes for captive portal checks, WireGuard protocol switching, DEX HTTP validation, and UI crashes.

A new Beta release for the Windows Cloudflare One Client is now available on the beta releases downloads page.

This beta release includes the following changes and improvements:

  • Added support for routing non-RFC 1918 local IPv4 networks through the WARP tunnel when unrestricted LAN inclusion is enabled by policy or MDM.
  • Improved DNS reliability on networks with lower MTUs by clamping the TCP maximum segment size (MSS) for DNS-over-HTTPS connections sent through the tunnel.
  • Improved API reliability by retrying requests dropped when reusing pooled connections.
  • The client no longer requires the Windows WLAN AutoConfig service to be running.
  • Implemented a service recovery mechanism backed by Windows scheduler task to start WARP service on system unlock if not already started.
  • Fixed slow captive portal checks causing the client service to become unresponsive or restart while connecting.
  • Fixed a race when switching tunnel protocols during key rotation that could prevent WireGuard from connecting.
  • Fixed the client continuing to report 'No network' after a successful manual disconnect.
  • Fixed Digital Experience Monitoring (DEX) HTTP tests failing TLS validation on Windows.
  • Fixed the client UI crashing at startup when it could not write to the Windows registry.
  • Fixed latency spikes and traffic interruptions during TPM-backed API authentication when hardware-backed registration is enabled.
  • Fixed trailing whitespace in BIOS serial numbers causing serial-number and client-certificate device posture checks to fail.
  • Fixed a client UI crash that could occur when the daemon connection was reset during an IPC request.
  • Fixed a startup crash when date formatting data for the system locale had not yet loaded.

Known issues

  • None

For Zero Trust documentation, see: https://developers.cloudflare.com/cloudflare-one/team-and-resources/devices/cloudflare-one-client/
For Consumer documentation, see: https://developers.cloudflare.com/warp-client/

warpwindowsvpndnsstability

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