CVE-2026-59727

Astro is a web framework for content-driven websites. In versions 3.10.0 through 7.0.3, when a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated client: component, Astro copied the directive value onto the rendered element without...

CVE-2026-59727 Astro: Cross-site scripting via unescaped transition:* directive values on hydrated islands

Astro is a web framework for content-driven websites. In versions 3.10.0 through 7.0.3, when a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated client: component, Astro copied the directive value onto the rendered element without...

Cross-site Scripting (XSS)

Astro is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to improper HTML escaping of user-controlled values in transition:persist, transition:scope, and transition:persist-props directives, which allows an attacker to inject arbitrary HTML or JavaScript into the server-rendered...

Improper Encoding or Escaping of Output

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output via the transition:persist, transition:scope, or transition:persist-props directives when...