Cloudflare

HTTP/3 issue affecting R2 custom domains

Minor Impact Resolved Duration: 3d 52m August 31, 2026

Current answer

Cloudflare experienced a minor incident: HTTP/3 issue affecting R2 custom domains. ServiceAlert observed recovery on Sep 3, 2026.

Official Cloudflare status page Current Cloudflare status ServiceAlert observed status change: Sep 3, 2026 at 7:40 PM UTC

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Investigating Identified Monitoring

Affected Components

Monitoring

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

Sep 3, 2026 at 3:14 PM UTC

Identified

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

Sep 1, 2026 at 2:46 PM UTC

Investigating

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.

Aug 31, 2026 at 6:47 PM UTC

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