Cloudflare incident

HTTP/3 issue affecting R2 custom domains

Minor Resolved View vendor source →

Cloudflare experienced a minor incident on August 31, 2026 affecting R2, lasting 3d. The incident has been resolved; the full update timeline is below.

Started
Aug 31, 2026, 06:47 PM UTC
Resolved
Sep 03, 2026, 07:32 PM UTC
Duration
3d
Detected by Pingoru
Aug 31, 2026, 06:47 PM UTC

Affected components

R2

Update timeline

  1. investigating Aug 31, 2026, 06:47 PM UTC

    Some Firefox users may see delayed or failed asset loads on R2 custom domains due to an incorrect HTTP/3 advertisement. We are working on a fix.

  2. identified Sep 01, 2026, 02:46 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Sep 03, 2026, 03:14 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Sep 03, 2026, 07:32 PM UTC

    This incident has been resolved.