High Domain Control Validation failure rate

September 11, 2026 01:40 UTC
Investigating - Let's Encrypt is investigating elevated failure rates for Domain Control Validation over the last hour, which may prevent subscribers from obtaining certificates.

September 11, 2026 02:11 UTC
Identified - We have identified an issue with our DNS resolver in our secondary validation. The change is being reverted, and we expect to be operational within 15 minutes.

September 11, 2026 02:39 UTC
Resolved - The incident has been resolved. Validations are succeeding.