CVE-2026-114128
mediumAstro is a web framework for content-driven websites.
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/withastro/astro/commit/a548223607b9bb146d5d90ddda495343f9a2a739 security-advisories@github.com
- https://github.com/withastro/astro/pull/17896 security-advisories@github.com
- https://github.com/withastro/astro/releases/tag/astro@7.3.2 security-advisories@github.com
- https://github.com/withastro/astro/security/advisories/GHSA-98hj-9722-w3j8 security-advisories@github.com