Incident History

We are investigating reports of impacted performance for some GitHub services.

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.

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.

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.

On June 8, 2026, between 14:49 and 14:54 UTC, a subset of requests to GitHub.com, the REST API, GraphQL API, and Webhooks UI/API experienced elevated error rates due to a transient infrastructure capacity issue that self-resolved within approximately 5 minutes.

Users experienced HTTP 500 errors and timeouts when accessing GitHub.com, the REST API, GraphQL API, and Webhooks UI/API for approximately 5 minutes, with the REST API taking up to 12 minutes to fully recover.

On May 25, 2026, between 09:02 UTC and 09:11 UTC, Git push operations over HTTPS and SSH experienced elevated failures. During this window, an average of 31% and a peak of 43% of push requests failed.

The incident was caused by a recently enabled code path that issued an unexpectedly expensive database query against a primary database. The resulting load exhausted the database's connection pool, which caused the push failures above. The acute impact resolved automatically as in-flight work completed. We mitigated the incident by disabling the feature flag controlling the new code path. To prevent recurrence, we have updated the affected background workflows to route reads to replica databases instead of the primary, removing the specific code pattern that caused this incident; broader follow-up work is underway to apply the same safeguard to similar workflows across GitHub.

On June 8, 2026, between 08:40 UTC and 09:30 UTC, the Claude Opus 4.7 model experienced degraded availability with error rates peaking at 8.4% and averaging 1.9%. This was due to an upstream provider issue that caused temporary unavailability and rate limiting on secondary failover systems. Users selecting Auto or alternative models were unaffected. We are improving provider failover mechanisms and monitoring to prevent similar issues.

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.

On June 6, 2026 between 16:18 UTC and 17:01 UTC, users experienced elevated error rates when performing Git operations (cloning, fetching, downloading archives) and accessing package registries. The issue affected users whose traffic was routed through our European infrastructure.During this time, on average 0.95% of Codeload requests and 9.2% of Package Registry requests failed with server errors. At peak, the Codeload error rate reached 1.76% and Package Registry errors reached 27%.The root cause was a planned network circuit migration that disrupted connectivity at one of our points of presence. Our process for shifting traffic away from the site did not operate as expected, resulting in a small amount of production traffic to continue being serviced at the effected site during the maintenance window. The issue was mitigated by rolling back the network change, restoring normal connectivity. Services fully recovered by 17:01 UTC.To reduce the likelihood of similar incidents in the future, we are reviewing our site drain process to make it more verbose and add visibility so any unexpected behavior is caught earlier.

This incident was used to notify for a maintenance event. There is no specific root cause analysis. Maintenance did run longer than expected (we were complete at 18:48 UTC) but the work proceeded as planned.