CVE-2026-27119

Svelte affected by XSS in SSR `<option>` element

State: Published
Severity: 5.1 Medium
Published: Feb 20, 2026
Updated: Feb 23, 2026
Reserved: Feb 17, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.1 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	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
sveltesveltejs	>= 5.39.3, < 5.51.5Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.