CVE-2026-42567

7.5 HIGH
Published: June 09, 2026 Modified: June 11, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7
Source: security-advisories@github.com
Product Release Notes
https://github.com/sveltejs/svelte/security/advisories/GHSA-9rmh-mm8f-r9h6
Source: security-advisories@github.com
Vendor Advisory

2 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
15th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

svelte