GitHub Copilot Degraded Performance - May 23, 2026

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

We are seeing an increased rate of authentication failures for app installation tokens, affecting approximately 1% of tokens.  We are continuing to investigate.

We are continuing to investigate an elevated error rate of authentication failures for app installation tokens.  Next update in one hour.

We are seeing signs of mitigation and are continuing to monitor for complete mitigation.  <br /><br />Next update in one hour.

We see significant signs of mitigation and are monitoring for full mitigation.

We have identified and are applying additional mitigation and will continue to monitor for complete mitigation.

This is fully mitigated, we will continue to monitor to ensure it does not reoccur.

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.