GHSA-X27W-589X-FRM2 Astro: Unauthenticated path override in the @astrojs/vercel ISR function

Summary When ISR is enabled, the serverless entrypoint lets an unauthenticated request decide which route the origin renders. The internal isr function reads the xastropath query parameter and rewrites the request path to it without any authentication. Edge level access controls only ever see the...