PhoenixStorybook: Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground

Summary An unsafe HEEx template generation vulnerability allows any unauthenticated user to execute arbitrary code on the server. The phoenixstorybook playground accepts user-controlled attribute values over WebSocket and interpolates them unsanitized into a HEEx template that is subsequently...

CVE-2026-8467

PHOENIX_STORYBOOK contains a code‑injection vulnerability (CVE-2026-8467) that allows unauthenticated remote code execution via HEEx template injection. An attacker can supply arbitrary attribute names/values to the psb-assign WebSocket handler; unescaped attribute values are interpolated into HE...

CVE-2026-8467 Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground

Code Injection vulnerability in phenixdigital phoenixstorybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation. The psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handleevent/3...