GitHub outage on September 4, 2026: Disruption with Copilot Code Review
GitHub reported an incident affecting GitHub for 1 hour 48 minutes on 4 September 2026, from 20:39 to 22:26 UTC.
Resolved
Official incident reported by GitHub
- Started
- 20:39
- 4 Sep 2026 UTC
- Resolved
- 22:26
- 4 Sep 2026 UTC
- Duration
- 1h 48m
- 1 hour 48 minutes
- Impact
- Major
- as rated by GitHub
- Updates
- 5
- posted by GitHub
Timeline
All times UTC.
Official incident from GitHub
Disruption with Copilot Code Review
-
Official
Investigating
We are investigating reports of impacted performance for some GitHub services.
-
Official
Investigating
Some users may be experiencing failures when using Copilot code review. We have identified the root cause and are working on a mitigation.
-
Official
Investigating
We are applying the mitigation and expect recovery within approximately 30 minutes.
-
Official
Monitoring
The degradation has been mitigated. We are monitoring to ensure stability.
-
Official
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.
"Official" rows are quoted from GitHub's public status page, www.githubstatus.com. Very long posts are shortened.
What our checkpoints saw
HostTracker's checkpoints, which test github.com from several locations, recorded no outage of 5 minutes or longer during this incident. A provider can report a problem that affects only some features, regions or accounts, which a check of the main address does not see. The live GitHub status shows what our checks see right now.
Does your product depend on GitHub?
An outage like this one reaches your users through your product, and most teams hear about it from a customer rather than from a dashboard. HostTracker watches any endpoint you name - your own site, an API you call, a vendor you resell - from 300+ locations, confirms a failure from several of them before it says anything, and then tells you by email, SMS, voice call or your chat tool.
You get the same record you are reading here for your own services: every outage timestamped, with the checks that observed it.
Independent measurement by HostTracker. Not affiliated with GitHub. Official updates are quoted from GitHub's public status page and remain GitHub's own words.