Intermittent errors with app installation token authentication

Incident Report for GitHub

Update

We are seeing signs of mitigation and are continuing to monitor for complete mitigation.

Next update in one hour.

Posted May 23, 2026 - 17:41 UTC

Update

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

Posted May 23, 2026 - 16:35 UTC

Update

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

Posted May 23, 2026 - 16:01 UTC

Investigating

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

Posted May 23, 2026 - 16:00 UTC