Advisories for Npm/@Astrojs/Vercel package

When ISR is enabled, the serverless entrypoint lets an unauthenticated request decide which route the origin renders. The internal _isr function reads the x_astro_path query parameter and rewrites the request path to it without any authentication. Edge level access controls only ever see the /_isr path, so they do not apply to the route that actually gets rendered. This is the same confused deputy problem as CVE-2026-33768, reachable again through …

The @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request …