Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Astro | \@Astrojs\/Vercel | < 10.0.2 |
Related Weaknesses (CWE)
References
- https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6Patch
- https://github.com/withastro/astro/pull/15959Issue Tracking
- https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2Release Notes
- https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84ExploitVendor Advisory
FAQ
What is CVE-2026-33768?
CVE-2026-33768 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 n...
How severe is CVE-2026-33768?
CVE-2026-33768 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33768?
Check the references section above for vendor advisories and patch information. Affected products include: Astro \@Astrojs\/Vercel.