CVE-2026-41067

Astro is a web framework. Prior to 6.1.6, the defineScriptVars function in Astro's server-side rendering pipeline uses a case-sensitive regex /<\/script>/g to sanitize values injected into inline <script> tags via the define:vars directive. HTML parsers close <script> elements case-insensitively and also accept whitespace or / before the closing >, allowing an attacker to bypass the sanitization with payloads like </Script>, </script >, or </script/> and inject arbitrary HTML/JavaScript. This vulnerability is fixed in 6.1.6.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/withastro/astro/security/advisories/GHSA-j687-52p2-xcff	Exploit Mitigation Vendor Advisory
https://github.com/withastro/astro/security/advisories/GHSA-j687-52p2-xcff	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

26 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Astro es un web framework. Antes de 6.1.6, la función defineScriptVars en el pipeline de renderizado del lado del servidor de Astro usa una expresión regular sensible a mayúsculas y minúsculas /<\/script>/g para sanear valores inyectados en etiquetas [script_tag] en línea a través de la directiva define:vars. Los analizadores HTML cierran los elementos [script_tag] sin distinción entre mayúsculas y minúsculas y también aceptan espacios en blanco o / antes del cierre >, permitiendo a un atacante eludir la sanitización con payloads como [/Script], </script > o </script/> e inyectar HTML/JavaScript arbitrario. Esta vulnerabilidad está corregida en 6.1.6.

Information

Published : 2026-04-24 17:16

Updated : 2026-10-26 22:10

NVD link : CVE-2026-41067

Mitre link : CVE-2026-41067

CVE.ORG link : CVE-2026-41067

JSON object : View

Products Affected

astro

astro

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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