A CVSS 10 flaw turns Kestra into an unauthenticated root shell

On September 2, 2026, CISA added CVE-2026-49869 to its KEV catalog: a CVSS 10 command injection in the open-source orchestrator Kestra, caused by a path comparison that lets any endpoint ending in ’configs’ through. Move to 1.0.45 or 1.3.21 before the September 5 federal deadline, then check whether the instance was already used as an entry point.