CVE-2026-50146
HIGH
astro
NVD
CVSS Score
7.1
Severity
HIGH
Published
Jun 22, 2026
Vendor
astro
Description
Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflected XSS during SSR. This vulnerability is fixed in 6.3.3.