Disruption with some GitHub services
This summary is created by Generative AI and may differ from the actual content.
Overview
Disruption with some GitHub services, including Issues, due to a severe spike in traffic, primarily to search endpoints, resulting in slow or timed out page loads and API requests for unauthenticated users, including release downloads from Actions jobs, between 22:01 UTC and 22:32 UTC on December 22, 2025.
Impact
Unauthenticated requests to github.com were degraded, resulting in slow or timed out page loads and API requests, with authenticated traffic not impacted.
Trigger
A severe spike in traffic, primarily to search endpoints.
Detection
The incident was detected through reports of impacted performance for some GitHub services, including Issues, with investigation starting at 22:31 UTC.
Resolution
The immediate response focused on identifying and mitigating the source of the traffic increase, along with automated traffic management, which restored full service for users, with additional mitigations prepared to prevent further spikes, including improving limiters for load to relevant endpoints.
Root Cause
The root cause was a severe spike in traffic, primarily to search endpoints, which caused degradation in service for unauthenticated users.