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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Astro \@Astrojs\/Vercel
cpe:2.3:a:astro:\@astrojs\/vercel:*:*:*:*:*:*:*:*
|
— |
10.0.2
|
References 4
https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c…
security-advisories@github.com
https://github.com/withastro/astro/pull/15959
security-advisories@github.com
https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2
security-advisories@github.com
https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84
security-advisories@github.com