CVE-2026-27119: Svelte affected by XSS in SSR `<option>` element

February 19, 2026 (updated February 23, 2026)

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.

References

github.com/advisories/GHSA-h7h7-mm68-gmrc
github.com/sveltejs/svelte
github.com/sveltejs/svelte/security/advisories/GHSA-h7h7-mm68-gmrc
nvd.nist.gov/vuln/detail/CVE-2026-27119

Code Behaviors & Features

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