CVE-2026-27119

5.1 mediumEPSS 0.2%

Medium (5.1) in svelte svelte. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in svelte 5.51.5.

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.

Severity

CVSS 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

CVSS 3.1

5.4 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-02-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

svelte:svelte

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-h7h7-mm68-gmrc	npm	svelte	>=5.39.3 <5.51.5	5.51.5

References

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

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