CVE-2026-73424

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

Published: Aug 17, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-441

6.5MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-441 CWE-862

Affected Products

withastro

oss-projectaka @astrojs/cloudflare, astro

astroLibrary

OSS Libraries / web-framework

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2

github.com

https://github.com/withastro/astro/pull/17370

github.com

https://github.com/withastro/astro/commit/3a43cf0f3690a8e33cb30109bc5165611cf38fcd

github.com

and 1 more references View all →

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