5.9
Medium
CVE-2026-42567 Svelte is a performance oriented web framework
Description
Svelte is a performance oriented web framework. From version 5.51.5 to before version 5.55.7, an internal regex in the Svelte runtime can take exponential time to test in <svelte:element this={tag}></svelte:element>. This issue has been patched in version 5.55.7.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| svelte 5.51 | 5.51.5 → < 5.55.7 | 5.55.7 |