Medium 5.3Published Jun 9, 2026

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

Updated under an hour ago (Oct 26, 2026, 1:00 PM ET)

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It affects sveltejs svelte and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for sveltejs svelte

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v4.0, CNA)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
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: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

sveltejs svelte sveltejs:svelte (from the name)	before 5.55.7	CNA record
Red Hat Red Hat Build of Podman Desktop redhat:podman_desktop	1	CISA ADP
svelte svelte svelte:svelte	before 5.55.7	NVD

References

References

https://github.com/sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42	x-refsource-confirm, vendor-advisory
https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7	x-refsource-misc, product, release-notes
https://access.redhat.com/security/cve/CVE-2026-42573
https://bugzilla.redhat.com/show_bug.cgi?id=2487093
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42573.json

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.