[svelte] Svelte SSR attribute spreading includes inherited properties from prototype chain

**[svelte] Svelte SSR attribute spreading includes inherited properties from prototype chain**

In server-side rendering, attribute spreading on elements (e.g. <div {...attrs}>) enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a precondition outside of Svelte's control — this can cause unexpected attributes to appear in SSR output or cause SSR to throw errors. Client-side rendering is not affected. References https://github.com/sveltejs/svelte/security/advisories/GHSA-crpf-4hrx-3jrp https://github.com/sveltejs/svelte/commit/73098bb26c6f06e7fd1b0746d817d2c5ee90755f https://github.com/sveltejs/svelte/releases/tag/svelte@5.51.5 https://github.com/advisories/GHSA-crpf-4hrx-3jrp

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**[devsupporter 해설]**

이 기사는 GitHub Security Advisories에서 제공하는 최신 개발 동향입니다. 관련 도구나 기술에 대해 더 알아보시려면 원본 링크를 참고하세요.