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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.

PUBLISHED Reserved 2026-02-17 | Published 2026-02-20 | Updated 2026-02-23 | Assigner GitHub_M




MEDIUM: 5.1CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N

Problem types

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

Product status

>= 5.39.3, < 5.51.5
affected

References

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

cve.org (CVE-2026-27119)

nvd.nist.gov (CVE-2026-27119)

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