What’s Vulnerable › Vulnerabilities

CVE-2026-73424: Astro: Unauthenticated path override in the @astrojs/vercel ISR function

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-17 · updated 2026-10-23
• Weakness: CWE-441

Description

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.

Affected products

• withastro astro: from 10.0.3, < 11.0.3

References

• https://github.com/withastro/astro/commit/3a43cf0f3690a8e33cb30109bc5165611cf38fcd
• https://github.com/withastro/astro/pull/17370
• https://github.com/withastro/astro/releases/tag/@astrojs/vercel@11.0.3
• https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2
• https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2

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