Disruption with billing information updates

Final update

Beginning on September 22, 2026 at 11:51 UTC, approximately 1,700 users experienced delays and errors when adding or updating billing address information because requests to the address validation service timed out or failed. Within the affected address validation flow, requests failed at an average rate of 69.3%, reaching 100% at peak. An operating system upgrade exposed a compatibility issue in an adapter used by our HTTP client library, causing requests to stall. A subsequent change to shorten request timeouts caused stalled requests to return connection errors and increased the failure rate. We mitigated the incident on September 24, 2026 at 20:24 UTC by changing the HTTP client used for address validation. We have added alerting to detect similar issues sooner and are extending the fix to other integrations.

1. Resolved · Sep 24, 20:41 UTC
   Beginning on September 22, 2026 at 11:51 UTC, approximately 1,700 users experienced delays and errors when adding or updating billing address information because requests to the address validation service timed out or failed. Within the affected address validation flow, requests failed at an average rate of 69.3%, reaching 100% at peak. An operating system upgrade exposed a compatibility issue in an adapter used by our HTTP client library, causing requests to stall. A subsequent change to shorten request timeouts caused stalled requests to return connection errors and increased the failure rate. We mitigated the incident on September 24, 2026 at 20:24 UTC by changing the HTTP client used for address validation. We have added alerting to detect similar issues sooner and are extending the fix to other integrations.
2. Monitoring · Sep 24, 20:24 UTC
   The degradation has been mitigated. We are monitoring to ensure stability.
3. Investigating · Sep 24, 20:10 UTC
   We have applied the mitigation and are seeing signs of recovery. We are continuing to monitor the system closely.
4. Investigating · Sep 24, 18:22 UTC
   We are continuing to work on mitigation. We will post another update in approximately one hour.
5. Investigating · Sep 24, 17:40 UTC
   We have identified the problem and are actively working on mitigation.
6. Investigating · Sep 24, 16:51 UTC
   We are investigating failures on billing information updates. Customers may be unable to create or update their billing information in the meantime.
7. Investigating · Sep 24, 16:51 UTC
   We are investigating reports of impacted performance for some GitHub services.