Outage in GitHub
Intermittent errors with app installation token authentication
Resolved MinorIncident Report
Summary AI Generated
GitHub experienced intermittent authentication failures affecting app installation tokens for approximately 3.7 hours, with roughly 1% of tokens impacted. The issue caused elevated error rates for services relying on app installation token authentication. The incident was gradually mitigated through applied fixes and monitoring, with full resolution confirmed after ensuring the issue did not reoccur.
We are investigating reports of impacted performance for some GitHub services.
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Latest Updates ( sorted recent to last )
RESOLVED
17 days ago - at 05/23/2026 07:32PM
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.
INVESTIGATING
17 days ago - at 05/23/2026 07:32PM
This is fully mitigated, we will continue to monitor to ensure it does not reoccur.
INVESTIGATING
17 days ago - at 05/23/2026 07:06PM
We have identified and are applying additional mitigation and will continue to monitor for complete mitigation.
INVESTIGATING
17 days ago - at 05/23/2026 06:42PM
We see significant signs of mitigation and are monitoring for full mitigation.
INVESTIGATING
17 days ago - at 05/23/2026 05:41PM
We are seeing signs of mitigation and are continuing to monitor for complete mitigation.
Next update in one hour.
INVESTIGATING
17 days ago - at 05/23/2026 04:35PM
We are continuing to investigate an elevated error rate of authentication failures for app installation tokens. Next update in one hour.
INVESTIGATING
17 days ago - at 05/23/2026 04:01PM
We are seeing an increased rate of authentication failures for app installation tokens, affecting approximately 1% of tokens. We are continuing to investigate.
INVESTIGATING
17 days ago - at 05/23/2026 04:00PM
We are investigating reports of impacted performance for some GitHub services.
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