CVE-2026-42567

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 . This issue has been patched in version 5.55.7...

CVE-2026-42567

CVE-2026-42567 affects Svelte runtimes from 5.51.5 up to 5.55.6, where an internal regex used during svelte:element tag validation can cause exponential-time processing (ReDoS) on certain tag names. The issue is triggered during the validation of , leading to significant CPU usage and potential...

PT-2026-41132

An internal regex in the Svelte runtime can take exponential time to test in . You are only vulnerable to this if you allow tags of unconstrained length. If your application only allows a predetermined list of tags or trims their length before passing them to svelte:element, you are safe...