Failures running diff-aware scans for GitHub.com customers

Incident Report for Semgrep

Resolved

Starting around 16:00 UTC, some diff-aware Managed Scans for GitHub.com projects failed due to inability to fetch information about relevant branches, coinciding with a degradation in GitHub availability. The failure rate returned to normal just after 17:00 UTC and the system is now stable.
Posted Apr 23, 2026 - 16:00 UTC