---
id: CVE-2026-73424
title: Astro is a web framework for content-driven websites
summary: >-
  Astro is a web framework for content-driven websites. From 10.0.3 until
  11.0.3, the Astro Vercel adapter in
  packages/integrations/vercel/src/serverless/entrypoint.ts accepts x_astro_path
  for the public /_isr function based only on the x-…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-441
  - CWE-862
published: '2026-08-17'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:11:46.833'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73424'
references:
  - url: >-
      https://github.com/withastro/astro/commit/3a43cf0f3690a8e33cb30109bc5165611cf38fcd
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/pull/17370'
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/releases/tag/@astrojs/vercel@11.0.3'
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2'
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00384
epssPercentile: 0.29695
ingestedAt: '2026-09-09T21:22:45.535Z'
---

## Overview

Astro is a web framework for content-driven websites. From 10.0.3 until 11.0.3, the Astro Vercel adapter in packages/integrations/vercel/src/serverless/entrypoint.ts accepts x_astro_path for the public /_isr function based only on the x-vercel-isr header, allowing unauthenticated GET requests to render routes protected only by Vercel edge path rules or split edge middleware. This issue is fixed in 11.0.3.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.