{"id":"CVE-2026-114128","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-114128","generatedAt":"2026-10-28T01:11:42.231Z","title":"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.","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.","published":"2026-10-21T18:17:26.000Z","lastModified":"2026-10-23T15:17:25.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00321,"percentile":0.24879,"date":"2026-10-26","history":[{"date":"2026-10-22","score":0.00263,"percentile":0.17136}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-21T18:17:26.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-10-21T18:17:25.507Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://github.com/withastro/astro/commit/a548223607b9bb146d5d90ddda495343f9a2a739","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/pull/17896","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/releases/tag/astro@7.3.2","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/security/advisories/GHSA-98hj-9722-w3j8","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-114128","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}