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CVE-2026-42567

CVE-2026-42567 · Svelte: ReDoS in `<svelte:element>` Tag Validation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.9 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • svelte

    Versions
    • >= 5.51.5, < 5.55.7: Affected

    No fix published

  • svelte npm

    Affected ranges
    • SEMVER: ≥ 5.51.5, < 5.55.7

    Update to 5.55.7

Original sources

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