GHSA-gw32-9rmw-qwww

GHSA-gw32-9rmw-qwww · svelte is vulnerable to XSS with textarea bind:value

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### Summary A server-side rendered `<textarea>` with two-way bound value does not have its value correctly escaped in the rendered HTML. ### Details In SSR, `<textarea bind:value={...}>` does not have its value escaped when it is rendered into the HTML as `<textarea>...</textarea>`. ### PoC Put this in a server-side-rendered Svelte component: ``` <script> let value = `test'"></textarea><script` + `>alert('BIM');</sc` + `ript>`; </script> <textarea bind:value /> ``` ### Impact - Only affects SSR - Needs a `<textarea bind:value>` filled by user content via two-way binding

CVSS 8.4 · High · Fix available

Published

2026-01-16T21:02:56Z

Updated

2026-02-03T03:17:01.517258Z

Stack: node

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