Changes / GitHub / Several services are degraded
GitHub: Critical incident: Several services are degraded
Summary
GitHub’s critical incident degraded Pull Requests and Webhooks and paused enterprise migrations, starting 2026-10-06 19:57 UTC and resolving 2026-10-06 23:40 UTC (3 h 43 min). GitHub reported an outage from 19:44 to 19:50 UTC affecting 12 services, with approximately 1.16 million failed requests. It identified GitHub Enterprise Importer as the trigger and reported deploying a mitigation.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
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After: Several services are degraded
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After: critical
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After: resolved
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After: 2026-10-06 19:57 UTC
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After: 2026-10-06 23:40 UTC
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After: Pull Requests, Webhooks
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After: We are investigating reports of degraded performance for Pull Requests and Webhooks
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After: Webhooks is operating normally.
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After: Pull Requests is operating normally.
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After: A number of services including issues, pull requests, and webhooks, were briefly degraded, but have now recovered. Enterprise migrations are paused while we validate causes and mitigations.
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After: The degradation has been mitigated. We are monitoring to ensure stability.
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After: All services are functioning normally except for enterprise migrations, which are still paused. They will resume soon.
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After: We are working towards a mitigation that will allow us to resume processing enterprise migrations.
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After: We are deploying a mitigation and plan to resume migrations shortly thereafter
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After: On October 6, 2026, from 19:44 to 19:50 UTC, GitHub experienced a service outage with elevated error rates peaking at 1.30% of all requests, totaling approximately 1.16 million failed requests. This impacted 12 services across GitHub, including Pull Requests, Webhooks, Repos, OAuth, Git over SSH, Codespaces, and Gists. The incident was triggered by GitHub Enterprise Importer (GEI) making multiple, long duration queries which saturated a database connection pool. Recovery was seen at approximately 19:50 UTC once the migration's calls stopped; GEI migrations were reenabled at 23:32 UTC after a code fix was merged.<br /><br />We have completed a detailed root-cause review and are implementing improved database-health safeguards. We will continue to review and add additional safeguards to prevent future recurrence.
First version of this incident archived by Rewindex. View the live incident.
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Critical incident: Several services are degraded (this change) GitHub’s critical incident degraded Pull Requests and Webhooks and paused enterprise migrations, starting 2026-10-06 19:57 UTC and resolving 2026-10-06 23:40 UTC (3 h 43 min). GitHub reported an outage from 19:44 to 19:50 UTC affecting 12 services, with approximately 1.16 million failed requests. It identified GitHub Enterprise Importer as the trigger and reported deploying a mitigation. | Major incident |