{"id":"CVE-2026-114128","title":"Astro: Reflected/Stored XSS via unescaped <script>/<style> tag content in JSX/MDX rendering","summary":"Astro is a web framework for content-driven websites. Prior to 7.3.2, Astro's JSX and MDX rendering pipeline treats string children of script and style elements as trusted HTML without distinguishing compiler-generated literal content fr…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"withastro","product":"astro","affected":["astro < 7.3.2"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T17:32:28.466Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114128","references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-98hj-9722-w3j8","label":"https://github.com/withastro/astro/security/advisories/GHSA-98hj-9722-w3j8"},{"url":"https://github.com/withastro/astro/pull/17896","label":"https://github.com/withastro/astro/pull/17896"},{"url":"https://github.com/withastro/astro/commit/a548223607b9bb146d5d90ddda495343f9a2a739","label":"https://github.com/withastro/astro/commit/a548223607b9bb146d5d90ddda495343f9a2a739"},{"url":"https://github.com/withastro/astro/releases/tag/astro@7.3.2","label":"https://github.com/withastro/astro/releases/tag/astro@7.3.2"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T18:09:27.276Z","slug":"CVE-2026-114128","body":"## Overview\n\nAstro is a web framework for content-driven websites. Prior to 7.3.2, Astro's JSX and MDX rendering pipeline treats string children of script and style elements as trusted HTML without distinguishing compiler-generated literal content from dynamic expression values. An application that passes attacker-controlled data directly as a dynamic child can allow a value containing a closing script or style tag to terminate the element and inject arbitrary HTML and JavaScript. Other JSX expression contexts escape dynamic strings automatically; the issue is limited to script and style children rendered through the astro:jsx renderer, including MDX components. Successful exploitation can produce reflected or stored cross-site scripting under the application's origin. This issue is fixed in 7.3.2.\n\n## Affected\n\n- `astro < 7.3.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}