Intermittent errors with app installation token authentication
Incident Lifecycle
Incident Timeline
Investigating
We have identified and are applying additional mitigation and will continue to monitor for complete mitigation.
May 23, 2026 at 7:06 PM UTC
Investigating
We see significant signs of mitigation and are monitoring for full mitigation.
May 23, 2026 at 6:42 PM UTC
Investigating
We are seeing signs of mitigation and are continuing to monitor for complete mitigation. <br /><br />Next update in one hour.
May 23, 2026 at 5:41 PM UTC
Investigating
We are continuing to investigate an elevated error rate of authentication failures for app installation tokens. Next update in one hour.
May 23, 2026 at 4:35 PM UTC
Investigating
We are seeing an increased rate of authentication failures for app installation tokens, affecting approximately 1% of tokens. We are continuing to investigate.
May 23, 2026 at 4:01 PM UTC
Investigating
We are investigating reports of impacted performance for some GitHub services.
May 23, 2026 at 4:00 PM UTC
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