5.1
Medium
CVE-2026-27122 svelte performance oriented web framework
Description
svelte performance oriented web framework. Prior to 5.51.5, 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. This vulnerability is fixed in 5.51.5.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| svelte 5.51 | earliest → < 5.51.5 | 5.51.5 |
References
- github.com github.com
Timeline
- Published
- Last modified