CVE-2026-73424: Astro: Unauthenticated path override in the @astrojs/vercel ISR function
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 xastropath 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Astro (@astrojs/vercel adapter, Vercel ISR function)to a version that resolves this vulnerability.Fixed in 11.0.3
Event History
Frequently Asked Questions
What is the severity of CVE-2026-73424?
The severity of CVE-2026-73424 is medium with a score of 6.5.
How do I fix CVE-2026-73424?
To fix CVE-2026-73424, update the Astro framework to a version later than 11.0.3 where the vulnerability has been addressed.
What type of vulnerability is CVE-2026-73424?
CVE-2026-73424 is an unauthenticated path override vulnerability in the Astro Vercel adapter.
What versions of Astro are affected by CVE-2026-73424?
Astro versions from 10.0.3 to 11.0.3 are affected by CVE-2026-73424.
What impact does CVE-2026-73424 have?
CVE-2026-73424 allows unauthenticated GET requests to potentially expose sensitive data through the path override in the Astro framework.