Vulnerability Details CVE-2026-33768
Astro is a web framework. Prior to version 10.0.2, 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 comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.6%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-33768
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cpe:2.3:a:astro:@astrojs/vercel:*