{"cve":"CVE-2026-114128","nvd":{"published":"2026-10-21T18:17:25.507","modified":"2026-10-23T15:17:25.413","status":"Awaiting Analysis","description":"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 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-79"],"references":["https://github.com/withastro/astro/commit/a548223607b9bb146d5d90ddda495343f9a2a739","https://github.com/withastro/astro/pull/17896","https://github.com/withastro/astro/releases/tag/astro@7.3.2","https://github.com/withastro/astro/security/advisories/GHSA-98hj-9722-w3j8"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-114128","score":0.00321,"percentile":0.24858,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-98hj-9722-w3j8","url":"https://osv.dev/vulnerability/GHSA-98hj-9722-w3j8","summary":"Astro: Reflected/Stored XSS via unescaped <script>/<style> tag content in JSX/MDX rendering","modified":"2026-10-22T16:45:03.728568551Z","packages":[{"ecosystem":"npm","name":"astro","purl":"pkg:npm/astro","ranges":["<7.3.2"],"fixed":["7.3.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}