CVE-2026-27119
Medium · 5.4CVSS
5.4
EPSS
0.2%
Published
Feb 20, 2026
CISA due date
—
The record
svelte performance oriented web framework. From 5.39.3, <=5.51.4, in certain circumstances, the server-side rendering output of an <option> element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | svelte | 5.39.3 | 5.51.5 |
Related vulnerabilities
- GHSA-h7h7-mm68-gmrc Svelte affected by XSS in SSR `` element Same vulnerability
- CVE-2026-42567 Svelte is a performance oriented web framework. Also affects svelte
- CVE-2026-42599 Svelte is a performance oriented web framework. Also affects svelte
- CVE-2026-42573 Svelte is a performance oriented web framework. Also affects svelte
- GHSA-f3cj-j4f6-wq85 Svelte: SSR XSS via Insecure Promise Serialization in hydratable Also affects svelte
- GHSA-rcqx-6q8c-2c42 Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State Also affects svelte
- GHSA-9rmh-mm8f-r9h6 Svelte: ReDoS in `` Tag Validation Also affects svelte
- GHSA-pr6f-5x2q-rwfp Svelte SSR vulnerable to cross-site scripting via spread attributes Also affects svelte