Disruption with Copilot Code Review

Updates timeline

1. Investigating Sep 4, 08:39 PM UTC

   We are investigating reports of impacted performance for some GitHub services.

2. Investigating Sep 4, 08:57 PM UTC

   Some users may be experiencing failures when using Copilot code review. We have identified the root cause and are working on a mitigation.

3. Investigating Sep 4, 09:54 PM UTC

   We are applying the mitigation and expect recovery within approximately 30 minutes.

4. Monitoring Sep 4, 10:25 PM UTC

   The degradation has been mitigated. We are monitoring to ensure stability.

5. Resolved Sep 4, 10:26 PM UTC

   On September 4, 2026, between 20:04 and 22:26 UTC, GitHub Copilot code review experienced an increased failure rate. Affected pull request reviews failed to complete or post review comments.<br /><br />The incident was caused by a change to the service’s authentication permissions that prevented it from submitting affected reviews to the GitHub API. We reverted the change and restored normal operation by 22:26 UTC.<br /><br />We apologize for the disruption.