CVE-2026-42573: fallo de gravedad media en sveltejs svelte
Svelte: XSS via DOM Clobbering of Internal Framework State
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 5.3epss 0.3%
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
Productos afectados
sveltejs · svelteCVEs relacionadas — sveltejs svelte
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-42567MEDIUMSvelte: ReDoS in `<svelte:element>` Tag ValidationEPSS 0.5%CVE-2026-27125MEDIUMSvelte SSR attribute spreading includes inherited properties from prototype chainEPSS 0.4%CVE-2024-45047MEDIUMPotential mXSS vulnerability due to improper HTML escaping in svelteEPSS 0.4%CVE-2026-27902MEDIUMSvelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration MarkersEPSS 0.3%CVE-2026-27901MEDIUMSvelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`EPSS 0.3%CVE-2026-27122MEDIUMSvelte SSR does not validate dynamic element tag names in `<svelte:element>`EPSS 0.2%
Referencias
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