Duo Security experienced a major incident on April 28, 2026 affecting Core Authentication Service, lasting 1h 3m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Apr 28, 2026, 02:22 PM UTC
We are investigating elevated authentication latency affecting customers . Authentication requests are continuing to succeed at this time, but customers may experience slower-than-normal response times and degraded performance during login attempts. Our team is actively working to identify the cause and restore normal performance as quickly as possible.
- monitoring Apr 28, 2026, 02:56 PM UTC
We have applied mitigation steps and are seeing improved authentication performance for customers in the deployment. Authentication latency has decreased, and the service is recovering. Our team is continuing to monitor the environment closely to ensure stability while we investigate the underlying cause.
- resolved Apr 28, 2026, 03:26 PM UTC
The issue causing elevated authentication latency has been fully resolved. Authentication performance has returned to normal levels, and customers should no longer experience delays during login attempts.