GitHub availability report: March 2026

In March 2026, GitHub faced four significant service degradation incidents due to various technical issues. On March 3, a bug in a deployment led to a massive load on the user settings caching mechanism, affecting multiple services including GitHub.com and GitHub API, with request failures peaking at 40% and 43% respectively. To resolve it, GitHub rolled back the faulty deployment and implemented a killswitch and improved monitoring. On March 5, a Redis infrastructure update caused misconfiguration in the load balancer, resulting in delays and failures in GitHub Actions, which were mitigated by correcting the configuration. On March 19 and 20, the Copilot Coding Agent service was disrupted due to system authentication issues, which were mitigated by rotating credentials. Lastly, on March 24, an upstream dependency outage affected the Microsoft Teams Integration, causing a high error rate in delivering notifications, which was resolved by coordination with service teams. GitHub is working on long-term architectural improvements and immediate measures such as enhanced monitoring, automation, and updated runbooks to prevent future incidents.

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