CVE-2026-42573 MEDIUM

CVE-2026-42573: Svelte: XSS via DOM Clobbering of Internal Framework State

Vendor Sveltejs

Product svelte

Weakness CWE-79 · XSS

Published June 9, 2026

Last update June 30, 2026

View on NVD All CVEs

CVSS base score

5.3/10

Attack vector Network

Attack complexity High

Privileges required Low

User interaction None

Confidentiality —

Integrity —

CVSS vector

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

What the vulnerability does

01Description

Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.

Key dates

02Disclosure timeline

June 9, 2026 CVE published

June 30, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-42573 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

Related vulnerabilities

04Related CVE

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