Medium 5.1Published Feb 20, 2026

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

Updated under an hour ago (Oct 27, 2026, 11:10 AM ET)

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It affects sveltejs svelte and 1 other product. Add what you run to find out whether that includes you.

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Every CVE for sveltejs svelte

Exploited in the last 30 days

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: 5.1 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

sveltejs svelte sveltejs:svelte (from the name)	from 5.39.3, < 5.51.5	CNA record
svelte svelte svelte:svelte	from 5.39.3 before 5.51.5	NVD

References

References

https://github.com/sveltejs/svelte/security/advisories/GHSA-h7h7-mm68-gmrc	x-refsource-confirm, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.