CVE-2026-33768

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

@astrojs/vercel

PublishedMar 24, 2026

First seenMar 24, 2026

Weakness typeCWE-441CWE-441 CWE-862Missing authorization

How to fix

Update

@astrojs/vercel10.0.2 or later
astro \@astrojs\/vercel10.0.2 or later

Affected products

Product	Affected versions	Fixed in
@astrojs/vercelnpm	v < 10.0.2	10.0.2
astro \@astrojs\/vercel	v < 10.0.2	10.0.2

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