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High 7.5Published Jun 9, 2026
CVE-2026-42567Svelte is a performance oriented web framework.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
svelte svelte svelte:svelte | from 5.51.5 before 5.55.7 | NVD |
References
- https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7product, release-notes
- https://github.com/sveltejs/svelte/security/advisories/GHSA-9rmh-mm8f-r9h6vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.