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Semaphore CI: Periodic authentication failure with GitHub repositories

Semaphore CI · semaphoreci.comImpact: minorResolved2026-09-03 12:45 UTC
Public — what happened

Summary

Our engineers are actively monitoring the intermittent issue affecting Git operations over HTTPS. We will share another update when more information becomes available. To prevent affected builds from stalling while waiting for credentials, our engineering team has implemented fail-fast behavior. Affected builds will now fail promptly, reducing unnecessary runtime. If the issue persists after rerunning the job, add the following command to the job before the affected Git operation to force Git to use HTTP/1.1: git config --global http.version HTTP/1.1

Timeline

Source of record: provider status page. Mirrored as reported; times in UTC.

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach Semaphore CI against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

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Related: Semaphore CI status & history. SquidGrid is not affiliated with Semaphore CI.