# GitHub: Disruption with Copilot Code Review

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-09-04 20:39 UTC · Resolved: 2026-09-04 22:26 UTC · Duration: 1.8 h
- Updates: 5
- [Vendor status page: https://stspg.io/dddfhld6fj0z](https://stspg.io/dddfhld6fj0z)
- [Company: GitHub](https://rewindex.com/company/github.md)

## 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, sol)_
## Timeline of updates

- **investigating** 2026-09-04 20:39 UTC: We are investigating reports of impacted performance for some GitHub services.
- **investigating** 2026-09-04 20:57 UTC: Some users may be experiencing failures when using Copilot code review. We have identified the root cause and are working on a mitigation.
- **investigating** 2026-09-04 21:54 UTC: We are applying the mitigation and expect recovery within approximately 30 minutes.
- **monitoring** 2026-09-04 22:25 UTC: The degradation has been mitigated. We are monitoring to ensure stability.
- **resolved** 2026-09-04 22:26 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.

## Rewindex changes for this incident

- 2026-09-04 20:39 UTC: [Major incident: Disruption with Copilot Code Review](https://rewindex.com/change/i8f57a23b917e47.md)


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Canonical: https://rewindex.com/company/github/incidents/zw1hbx2yyhvr · Markdown: https://rewindex.com/company/github/incidents/zw1hbx2yyhvr.md · JSON: https://rewindex.com/api/v1/companies/github/incidents/zw1hbx2yyhvr · Generated 2026-10-18T09:35:06.027Z