Prefect Horizon incident

Increased Build failures due to GitHub outage

Minor Resolved View vendor source →
Started
Feb 09, 2026, 03:53 PM UTC
Resolved
Feb 09, 2026, 08:09 PM UTC
Duration
4h 16m
Detected by Pingoru
Feb 09, 2026, 03:53 PM UTC

Affected components

Horizon: Builds (Builds)

Update timeline

  1. investigating Feb 09, 2026, 03:53 PM UTC

    GitHub has reported an outage that impacts Git operations, which impacts Horizon builds being unable to fetch source code from Hosted servers. This causes cloning failures any new builds that are linked to a GitHub repository. External server builds, Remix server builds, and MCP request...

  2. resolved Feb 09, 2026, 08:09 PM UTC

    Git operations have been restored, and Hosted Server builds are functioning normally

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