Is GitHub down? › Outage history › Oct 21, 2026

GitHub outage on Oct 21, 2026: what happened

On Oct 21, 2026, the GitHub status page reported "Delays for Pull Requests and Webhook deliveries". About 4 hours 30 min: from Oct 21, 2026, 14:52 UTC to Oct 21, 2026, 19:22 UTC, by the official start and resolution times.

Started

Oct 21, 2026, 14:52 UTC

Resolved

Oct 21, 2026, 19:22 UTC

Duration

4 hours 30 min

Official impact

Critical

Affected

Webhooks, Pull Requests, Actions

Source

Delays for Pull Requests and Webhook deliveries on the GitHub status page

The GitHub status page rated it "Critical", its highest impact level: an outage of the affected parts, not only slowness.

What caused the GitHub outage?

The GitHub status page has not published a cause. Its updates describe the symptoms only.

When was it fixed?

The GitHub status page marked it resolved at Oct 21, 2026, 19:22 UTC, 4 hours 30 min after it started. Its resolution note: "This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available."

Timeline of official updates

Every update the GitHub status page posted, oldest first. Times are UTC.

1. Oct 21, 2026, 14:52 UTC investigating

   We are investigating reports of degraded performance for Actions, Pull Requests and Webhooks

2. Oct 21, 2026, 15:15 UTC investigating

   Actions is experiencing degraded performance. We are continuing to investigate.

3. Oct 21, 2026, 15:36 UTC investigating

   We are investigating delays affecting pull request updates and webhook deliveries. Increased load on our event streaming platform is contributing to hotspots. We are shifting traffic away from affected areas and adding processing capacity; impact is ongoing while these mitigations take effect.

4. Oct 21, 2026, 15:58 UTC investigating

   We continue to see delays affecting pull request updates, webhook deliveries, and audit log events. The event streaming platform is showing signs of recovery, and we are monitoring as the impact continues.

5. Oct 21, 2026, 16:17 UTC investigating

   Audit log events and Actions workflow status updates continue to be delayed. Pull request updates and webhook deliveries are recovering as we restore event processing and work through backlogs. We're monitoring the recovery and will share further updates as we learn more.

6. Oct 21, 2026, 16:25 UTC investigating

   Audit log events are delayed by up to 100 minutes, and Actions workflow status updates continue to experience extended delays. Pull request updates and webhook deliveries are recovering as we restore event processing and work through backlogs. We're monitoring recovery and will share further updates as we learn more.

7. Oct 21, 2026, 16:33 UTC investigating

   Pull Requests is operating normally.

8. Oct 21, 2026, 16:34 UTC investigating

   Audit log events continue to be delayed by up to 110 minutes. Pull request updates have recovered. Actions is recovering, and users should no longer experience impact in Actions. Webhook deliveries continue to recover as we work through backlogs. We are monitoring recovery and will share further updates as we learn more.

9. Oct 21, 2026, 16:57 UTC investigating

   Actions and Webhooks are operating normally.

10. Oct 21, 2026, 16:59 UTC investigating

    Actions and webhook deliveries have recovered. Audit log events are still delayed by about 100 minutes. We are working through the backlog, and full recovery will take some time. We will share more updates as recovery continues.

11. Oct 21, 2026, 17:09 UTC investigating

    Pull request updates, Actions, and webhook deliveries have recovered. Audit log events are recovering and delays are decreasing, but we expect the remaining backlog to take approximately two to three hours to clear. We're monitoring recovery and will share further updates.

12. Oct 21, 2026, 18:18 UTC investigating

    Audit log events are recovering, with delays now below 90 minutes as the remaining backlog is processed. We've reduced load on the event-streaming platform and are monitoring recovery. Further updates will follow.

13. Oct 21, 2026, 18:52 UTC investigating

    Audit log events continue to recover, with delays now below 70 minutes. We've applied mitigations to speed recovery and expect audit logs to fully recover in about 40 minutes. Pull request updates, Actions, and webhook deliveries remain recovered. We are monitoring progress and will share further updates.

14. Oct 21, 2026, 19:22 UTC investigating

    Pull request updates, Actions, and webhook deliveries have recovered. Audit log delays are now below 40 minutes, within the healthy threshold, and continue to decrease as the remaining backlog is processed.

15. Oct 21, 2026, 19:22 UTC resolved

    This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.

What our checks saw

• Our once-a-minute checks recorded GitHub as degraded from Oct 21, 2026, 14:58 UTC to 17:06 UTC (2 hours 8 min, read from the official status page).

GitHub outage questions

Other recent GitHub incidents

• Degraded availability for GitHub Actions, GitHub Pages and Webhooks Oct 19, 2026, 15:49 UTC, 1 hour 8 min
• CCA Automations are delayed when starting an Automation Oct 15, 2026, 18:31 UTC, 24 minutes
• [Retroactive] Actions workflow run logs delayed Oct 14, 2026, 00:12 UTC, duration not stated
• Incident with Actions, Pull Requests and Issues Oct 12, 2026, 12:21 UTC, 7 hours 54 min
• Incident with Git Operations, Issues, Actions and Pull Requests Oct 7, 2026, 17:17 UTC, 48 minutes
• Incident with Git Operations, Pull Requests and Actions Oct 7, 2026, 16:25 UTC, duration not stated

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Quotes are the GitHub status page's own words, from the official incident. Is It Up or Down is independent and not affiliated with GitHub. Times are UTC.