CVE-2026-27119 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Svelte	Svelte	>= 5.39.3, < 5.51.5

Related Weaknesses (CWE)

CWE-79

References

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

FAQ

What is CVE-2026-27119?

CVE-2026-27119 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 al...

How severe is CVE-2026-27119?

CVE-2026-27119 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-27119?

Check the references section above for vendor advisories and patch information. Affected products include: Svelte Svelte.