PYSEC-2026-3571 Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration

Summary The standalone flyto-verification service exposes POST /run with no authentication, on all interfaces 0.0.0.0:8344 per the shipped Dockerfile. The request body's callbackurl is used verbatim for an outbound POST that unconditionally attaches X-Internal-Key: $FLYTORUNNERSECRET. The...