CVE-2025-27109: Solidjs Solid

High severity, CVSS 7.3. EPSS: 0.3% chance of exploitation in the next 30 days.

solid-js is a declarative, efficient, and flexible JavaScript library for building user interfaces. In affected versions Inserts/JSX expressions inside illegal inlined JSX fragments lacked escaping, allowing user input to be rendered as HTML when put directly inside JSX fragments. This issue has been addressed in version 1.9.4 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Solidjs Solid: before 1.9.4 (fixed in 1.9.4)

Published 2025-02-21. Last modified 2026-06-17.