Svelte affected by XSS in SSR `` element_CVE-2026-27119

5.1 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-27119

Source GitHub_M

Published Feb 20, 2026 at 22:25

Affected Product

Vendor sveltejs

Product svelte

Version >= 5.39.3, < 5.51.5

Affected Versions sveltejs svelte >= 5.39.3, < 5.51.5

CWE Classification

CWE-79

References

github.com /sveltejs/svelte/security/advisories/GHSA-h7h7-mm68-gmrc

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    "published": "2026-02-20T22:25:42.794Z",
    "modified": "2026-02-20T22:25:42.794Z",
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