CVE-2026-33768CRITICAL 9.1EPSS p24.6%

CVE-2026-33768CVE-2026-33768

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.33% probability of exploitation · percentile 24.6% · 2026-06-19T12:03:05Z
Published2026-03-24
Last modified2026-03-26

Underlying weaknesses· 2

CWE-441CWE-862

References

  1. https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6ed
  2. https://github.com/withastro/astro/pull/15959
  3. https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2
  4. https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84

2

TypeTargetConfidenceTier
WeaknessUnintended Proxy or Intermediary ('Confused Deputy')cwe-4410%live
WeaknessMissing Authorizationcwe-8620%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.