Resolved: This incident has been resolved and ACME certificate issuance times have returned to normal.
Summary: Beginning at approximately 6:00 AM ET on August 24, 2026, some ACME certificate orders took longer than usual to complete.
Cause: The delay occurred during the Certificate Transparency (CT) logging step of issuance. Before a publicly trusted certificate is returned, it is submitted to several independently operated public CT logs. One external log operator experienced availability issues, which increased the time needed to complete this step. CT logging completed successfully for every certificate, and every certificate carried timestamps from three independently operated CT logs, as industry requirements specify.
Impact: ACME and API services remained operational throughout. However, certificate issuance took longer than usual to complete because of the additional time required for Certificate Transparency (CT) logging. As a result, some ACME clients reached their configured timeout before the completed certificate was returned.
Timeline:
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August 24, 2026, 6:00 AM ET: Increased ACME certificate issuance times began.
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August 25, 2026, 10:00 AM ET: Issuance times returned to normal and the incident was resolved.
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August 25, 2026, 12:00 PM ET: Customers were notified of the root cause and resolution.
Resolution: Issuance times returned to normal and the service is operating as expected. No changes to ACME client timeout settings were required; default settings are sufficient.