CVE-2026-27119 MEDIUM

CVE-2026-27119: Svelte affected by XSS in SSR `<option>` element

Vendor Sveltejs
Product svelte
Weakness CWE-79 · XSS
Published February 20, 2026
Last update February 23, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 20, 2026 CVE published
February 23, 2026 Record updated