CVE-2026-33768

CRITICAL EPSS 24.8%
Published Mar 24, 20263mo ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
24.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-441
CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
astro\@astrojs\/vercel* <10.0.2

References 4

  • github.com https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6ed
    Patch
  • github.com https://github.com/withastro/astro/pull/15959
    Issue Tracking
  • github.com https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2
    Release Notes
  • github.com https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6ed
    Patch