CVE-2026-126363

Astro is a web framework for content-driven websites. From 0.2.0 until 7.1.2, the @astrojs/solid-js renderer inserted a named slot into the quoted name attribute of an astro-slot wrapper without HTML escaping. A request-controlled slot name containing a quote could terminate the attribute and inject active HTML. Exploitation required a hydrated Solid component using a client:* directive and dynamic access to the attacker-chosen slot property; a component that did not render that slot emitted only escaped fallback content. This issue is fixed in version 7.1.2.

• CWE-79

• https://github.com/withastro/astro/commit/290b196ddb48de11783ff128e2b7272c61490a20
• https://github.com/withastro/astro/releases/tag/@astrojs/solid-js@7.1.2
• https://github.com/withastro/astro/security/advisories/GHSA-jmv2-qgxf-f995

Published

Nov 13, 2026

Last Modified

Nov 13, 2026

Status

Received

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