CVE-2026-67179 [HIGH] – Genkit does not properly validate host request headers. Any host on the developer’s networ

Genkit does not properly validate host request headers. Any host on the developer’s network, and any website the developer visits (via DNS rebinding), can reach POST /api/runAction on the Dev UI server (default port 4000) and execute any registered Genkit action and read the result. Fixed on 2026-06-18.