# Disruption with Copilot Code Review

- Provider: [GitHub](https://down.guide/providers/github)
- Confidence: Confirmed
- Impact: Partial outage
- lasted 1h 48m
- started 2026-09-04 20:39 UTC
- GitHub states the impact was 2026-09-04 20:04 to 22:26 UTC (2h 22m)
- id: DWN-d0097de146
- Official page: https://stspg.io/dddfhld6fj0z

## Root cause
> The incident was caused by a change to the service’s authentication permissions that prevented it from submitting affected reviews to the GitHub API.

[Postmortem](https://stspg.io/dddfhld6fj0z)

## Updates from GitHub
### 2026-09-04 20:39 UTC: investigating
We are investigating reports of impacted performance for some GitHub services.

### 2026-09-04 20:57 UTC: investigating
Some users may be experiencing failures when using Copilot code review. We have identified the root cause and are working on a mitigation.

### 2026-09-04 21:54 UTC: investigating
We are applying the mitigation and expect recovery within approximately 30 minutes.

### 2026-09-04 22:25 UTC: monitoring
The degradation has been mitigated. We are monitoring to ensure stability.

### 2026-09-04 22:26 UTC: resolved
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.
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.
We apologize for the disruption.

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