GitHub
criticalresolved

Authentication issues related to API requests

Jun 10, 2026, 03:20 PM → Jun 10, 2026, 04:39 PM · 1h 18m

Affected components

API RequestsIssues

Update timeline

  1. resolvedJun 10, 2026, 04:39 PM

    Between 15:05 UTC and 16:25 UTC, GitHub API services experienced degraded availability due to sporadic authentication failures affecting approximately 9% of requests. Customers experienced intermittent "logged out" behavior as erroneous 401 responses triggered repeated authentication flows in app integrations. Affected requests also experienced approximately 800ms of additional latency. <br /><br />A memcached proxy service rollout to our internal API infrastructure caused our authentication s

  2. monitoringJun 10, 2026, 04:37 PM

    The degradation has been mitigated. We are monitoring to ensure stability.

  3. investigatingJun 10, 2026, 04:36 PM

    The degradation affecting API Requests has been mitigated. We are monitoring to ensure stability.

  4. investigatingJun 10, 2026, 04:21 PM

    We continue to investigate issues related to sporadic authentication failures, impacting approximately 15% of API traffic. Erroneous 401 responses are causing app integrations to trigger authentication flows. We have identified a problematic component in our infrastructure and are working to mitigate.

  5. investigatingJun 10, 2026, 03:46 PM

    The degradation affecting Issues has been mitigated. We are monitoring to ensure stability.

  6. investigatingJun 10, 2026, 03:46 PM

    We continue to investigate issues related to sporadic authentication failures, impacting approximately 15% of API traffic. Further updates will be provided as we work to mitigate.

  7. investigatingJun 10, 2026, 03:27 PM

    We are investigating issues related to sporadic authentication failures impacting approximately 15% of API traffic. We will continue to investigate and provide updates.

  8. investigatingJun 10, 2026, 03:27 PM

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