CVE-2026-73424

Astro: Unauthenticated path override in the @astrojs/vercel ISR function

State: Published
Severity: 6.5 Medium
Published: Aug 17, 2026
Updated: Aug 18, 2026
Reserved: Aug 12, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')
CWE-862 Missing Authorization

Affected Products

Product	Versions
astrowithastro	>= 10.0.3, < 11.0.3Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.