EUVD-2026-337239

fkie_cve-2026-42573

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.

GHSA-rcqx-6q8c-2c42 — Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

Affected: npm: svelte

Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks.

You are vulnerable if all of the following is true: - you are using attribute spreading on a form element - you are using attribute spreading or allow a dynamic value for the `name` attribute on an input or button element within that form - both of these are simultaneously user-controllable

```svelte <form {...spread1}> <input {...spread2}> </form> ```

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EUVD-2026-337239

fkie_cve-2026-42573

GHSA-rcqx-6q8c-2c42 — Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State