Changes / GitHub / Disruption with Copilot Code Review
GitHub: Major incident: Disruption with Copilot Code Review
Summary
GitHub’s major Copilot code review incident ran from 2026-09-04 20:39 UTC to 2026-09-04 22:26 UTC (1 h 47 min). Affected pull request reviews failed to complete or post comments because an authentication-permissions change blocked submissions to the GitHub API; reverting the change restored normal operation.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
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After: Disruption with Copilot Code Review
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After: major
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After: resolved
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After: 2026-09-04 20:39 UTC
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After: 2026-09-04 22:26 UTC
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After: We are investigating reports of impacted performance for some GitHub services.
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After: Some users may be experiencing failures when using Copilot code review. We have identified the root cause and are working on a mitigation.
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After: We are applying the mitigation and expect recovery within approximately 30 minutes.
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After: The degradation has been mitigated. We are monitoring to ensure stability.
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After: 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.
First version of this incident archived by Rewindex. View the live incident.
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Disruption with Copilot Code Review (this change) GitHub’s major Copilot code review incident ran from 2026-09-04 20:39 UTC to 2026-09-04 22:26 UTC (1 h 47 min). Affected pull request reviews failed to complete or post comments because an authentication-permissions change blocked submissions to the GitHub API; reverting the change restored normal operation. | Major incident |