CVE-2026-42573: Svelte

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.

Affected products

• Svelte Svelte: before 5.55.7 (fixed in 5.55.7)

Published 2026-06-09. Last modified 2026-07-23.