CVE-2026-126363
Astro: Reflected XSS via unescaped slot names in @astrojs/solid-js
Description
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.
INFO
Published Date :
Nov. 12, 2026, 10:31 p.m.
Last Modified :
Nov. 12, 2026, 10:31 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Solution
- Update @astrojs/solid-js renderer to version 7.1.2.
- Ensure slot names are properly escaped.
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