# CVE-2026-41067

> Vulnerability · severity: **MEDIUM** (CVSS 6.1).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-41067
- **Published:** 2026-04-24
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.1
- **CWE codes:** CWE-79

## Affected products

- `astro:astro`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41067

## Citation

> AI Analytics. CVE-2026-41067. Retrieved 2026-08-17 from https://api.ai-analytics.org/cve/CVE-2026-41067. Derived from NIST NVD. Licensed CC0.

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