high7.5
CVE-2026-42567
Svelte: ReDoS in `<svelte:element>` Tag Validation
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | svelte | >= 5.51.5, <= 5.55.6 | 5.55.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Svelte | Svelte | from 5.51.5 before 5.55.7 |