Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Svelte | Svelte | < 5.55.7 |
Related Weaknesses (CWE)
References
- https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7ProductRelease Notes
- https://github.com/sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42Vendor Advisory
- 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
FAQ
What is CVE-2026-42573?
CVE-2026-42573 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 i...
How severe is CVE-2026-42573?
CVE-2026-42573 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42573?
Check the references section above for vendor advisories and patch information. Affected products include: Svelte Svelte.