Cloudflare incident
TLS Connectivity Issues Affecting Subset of Let's Encrypt Certificates
Resolved after 10 hours 30 minutes, affecting SSL Certificate Provisioning, on June 5, 2026.
A fix has been implemented and we are monitoring the results.
Affected components
Update timeline
- investigating Jun 05, 2026, 05:22 PM UTC
Cloudflare has identified an issue affecting a subset of Let's Encrypt certificates, in which unsupported CA bundling may result in TLS connectivity issues for some visitors.
- identified Jun 05, 2026, 05:28 PM UTC
Cloudflare has identified an issue affecting a subset of Let's Encrypt certificates, in which unsupported CA bundling may result in TLS connectivity issues for some visitors. Customers requiring immediate resolution may order a replacement certificate; re-issuance from the same Certificate Authority will resolve the issue. Customer action is not required for a permanent fix — Cloudflare engineering is rebuilding all impacted certificate chains, and affected certificates will be automatically restored to a valid state.
- monitoring Jun 06, 2026, 03:42 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 06, 2026, 03:53 AM UTC
This incident has been resolved.
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