Svelte: XSS via DOM Clobbering of Internal Framework State
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.3%
exploitation probability
0.3%top 76% of all CVEs
observed exploitation
nono source reports it
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:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N
Affected products
sveltejs · svelteReferences
https://access.redhat.com/security/cve/CVE-2026-42573https://bugzilla.redhat.com/show_bug.cgi?id=2487093https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7https://github.com/sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42573.json