Cloudflare incident

Issues with TLS certificates using Lets Encrypt CA

Cloudflare experienced a minor incident on May 31, 2026 affecting SSL Certificate Provisioning, lasting 5h 38m. The incident has been resolved; the full update timeline is below.

Started: May 31, 2026, 03:16 AM UTC
Resolved: May 31, 2026, 08:55 AM UTC
Duration: 5h 38m
Detected by Pingoru: May 31, 2026, 03:16 AM UTC

Affected components

SSL Certificate Provisioning

Update timeline

investigating May 31, 2026, 03:16 AM UTC

Cloudflare is investigating issues with Let's Encrypt certificates. Some visitors may experience TLS connectivity issues due to potentially unsupported CA bundling for a subset of Cloudflare customers. Customers are advised to change to a different Certificate Authority as a workaround.
identified May 31, 2026, 06:41 AM UTC

The issue has been identified and a fix is being implemented. Customers are advised to change to a different Certificate Authority as a workaround.
resolved May 31, 2026, 08:55 AM UTC

This incident has been resolved.