Outage in Cloudflare
TLS Connectivity Issues Affecting Subset of Let's Encrypt Certificates
Resolved MinorIncident Report
Summary AI Generated
Cloudflare experienced TLS connectivity issues affecting a subset of Let's Encrypt certificates due to unsupported CA bundling, causing connection problems for some website visitors. The incident impacted Cloudflare Sites and Services along with SSL Certificate Provisioning for 10.5 hours. Cloudflare implemented a fix by rebuilding all impacted certificate chains and automatically restoring affected certificates to a valid state.
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.
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Latest Updates ( sorted recent to last )
MONITORING
1 day ago - at 06/06/2026 03:42AM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
1 day ago - at 06/05/2026 05:28PM
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.
INVESTIGATING
1 day ago - at 06/05/2026 05:22PM
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.
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