sveltejs/svelte · Security
Svelte SSR does not validate dynamic element tag names in `<svelte:element>`
- GHSA ID
- GHSA-m56q-vw4c-c2cp
- CVE ID
- CVE-2026-27122
- Severity
- medium
- Published
- Updated
- CVSS v4
- 5.1 · CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N
Description
When using <svelte:element this={tag}> in server-side rendering, the provided tag name is not validated or sanitized before being emitted into the HTML output. If the tag string contains unexpected characters, it can result in HTML injection in the SSR output. Client-side rendering is not affected.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')