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Medium · 5.1 CVE-2026-27119 EUVD-2026-7510GHSA-h7h7-mm68-gmrc

Svelte affected by XSS in SSR `<option>` element

Published Feb 20, 2026 · Updated Feb 23, 2026 · Assigned by GitHub_M

Description

svelte performance oriented web framework. From 5.39.3, <=5.51.4, in certain circumstances, the server-side rendering output of an <option> element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.

Affected products

VendorProductAffectedFixed
sveltejs svelte >= 5.39.3, < 5.51.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm svelte >= 5.39.3, < 5.51.5 5.51.5 GHSA-h7h7-mm68-gmrc

References