[CVE-2026-50146] Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts …

Descripción técnica

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.

Puntuación CVSS

Score: 7.1/10 — Severidad: HIGH — Estado NIST: Modified

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

Productos afectados

Astro — Astro

Debilidades (CWE)

CWE-80

Fuente oficial

Publicado en NIST NVD.