GHSA-rcqx-6q8c-2c42

Source

https://github.com/advisories/GHSA-rcqx-6q8c-2c42

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-rcqx-6q8c-2c42/GHSA-rcqx-6q8c-2c42.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-rcqx-6q8c-2c42

Aliases

CVE-2026-42573

Downstream

CGA (6)

Published

2026-05-14T20:29:13Z

Modified

2026-06-09T18:45:28Z

Severity

5.3 (Medium) CVSS_V4 - 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 CVSS Calculator

Summary

Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

Details

Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks.

You are vulnerable if all of the following is true:

you are using attribute spreading on a form element
you are using attribute spreading or allow a dynamic value for the name attribute on an input or button element within that form
both of these are simultaneously user-controllable

<form {...spread1}>
  <input {...spread2}>
</form>

Database specific

{
    "cwe_ids":  [
        "CWE-79"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-05-14T20:29:13Z",
    "nvd_published_at":  "2026-06-09T17:17:07Z",
    "severity":  "MODERATE"
}

References

Affected packages

npm / svelte

Package

Name: svelte; View open source insights on deps.dev
Purl: pkg:npm/svelte

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

5.55.7

Database specific

last_known_affected_version_range

"<= 5.55.6"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-rcqx-6q8c-2c42/GHSA-rcqx-6q8c-2c42.json"