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GitHub Copilot: Intermittent errors with app installation token authentication

MinorStatus: resolvedStarted Resolved (3.5 h)1 updatewww.githubstatus.com (opens in new tab)

Timeline of updates

  1. resolved

    On May 23, 2026 between 06:00 UTC and 19:12 UTC, GitHub experienced intermittent errors authenticating GitHub app installation tokens . During this time, between 1-5% of app installation token authentication requests failed, with an average of 2.3% and the error rate peaking at approximately 5.4% around 14:00 UTC. Users may have experienced authentication failures when using GitHub Apps, including failures in Git operations and API calls using app installation tokens. The issue was caused by an issue in a caching proxy component and was remediated by rolling back that component to a previous version. We are taking steps to improve monitoring for cache miss anomalies to ensure that token authentication remains functional during infrastructure changes and reviewing our protocol for testing and when we upgrade third-party dependencies.

From GitHub Copilot’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.

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This incident predates live tracking (October 17, 2026). It came from the vendor’s own published history, which is not covered by checkpoints.

Impact, status and times are the vendor’s own, as last archived. View on www.githubstatus.com (opens in new tab).

Cite this

Status incident (vendor impact label: minor) posted by GitHub Copilot, started 2026-05-23 16:00 UTC, resolved after 3.5 h, 1 update(s).

Title
Intermittent errors with app installation token authentication
Vendor
GitHub Copilot
Date
URL
https://rewindex.com/company/github-copilot/incidents/k5z4d1v1tqmt

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