PT-2026-41134 · Npm+2 · Svelte

Published 2026-05-14 · Updated 2026-06-09 · CVE-2026-42573

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Svelte versions prior to 5.55.7

Description Svelte is a performance oriented web framework. The software is susceptible to DOM clobbering of its internal framework state on elements, which can potentially lead to Cross-Site Scripting (XSS) attacks. This occurs when attribute spreading is used on a form element and attribute spreading or dynamic values are used for the name attribute on an input or button element within that form, provided both are user-controllable.

Recommendations Update to version 5.55.7.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-42573

GHSA-RCQX-6Q8C-2C42

Affected Products

Svelte

References · 5

• https://github.com/sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42573 · Security Note
• https://osv.dev/vulnerability/GHSA-rcqx-6q8c-2c42 · Vendor Advisory
• https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7 · Note
• https://github.com/sveltejs/svelte · Note