CVE-2026-54299

Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header is not validated against allowedDomains, an attacker can point the fetch at an arbitrary host and read the response. This vulnerability is fixed in 6.4.6.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:astro:astro:*:*:*:*:*:node.js:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Astro es un framework web. Antes de la versión 6.4.6, las aplicaciones Astro SSR con páginas de error prerrenderizadas (/404 o /500 usando export const prerender = true) obtienen esas páginas a través de HTTP en tiempo de ejecución cuando ocurre un error. La URL para esta obtención se deriva de request.url, que a su vez obtiene su origen del encabezado Host entrante. Cuando el encabezado Host no se valida contra allowedDomains, un atacante puede dirigir la obtención a un host arbitrario y leer la respuesta. Esta vulnerabilidad se corrige en la versión 6.4.6.

Information

Published : 2026-06-22 19:17

Updated : 2026-10-25 23:10

NVD link : CVE-2026-54299

Mitre link : CVE-2026-54299

CVE.ORG link : CVE-2026-54299

JSON object : View

Products Affected

astro

astro

CWE

CWE-20

Improper Input Validation

CWE-918

Server-Side Request Forgery (SSRF)

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