CVE-2026-27122
Svelte SSR does not validate dynamic element tag names in `<svelte:element>`
Summary
Svelte SSR does not validate dynamic element tag names in <svelte:element>
Original description
The description as published by the source.
svelte performance oriented web framework. Prior to 5.51.5, when using 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. This vulnerability is fixed in 5.51.5.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov