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CVE-2026-27902

Fixed upstream EPSS <1%CVSS 5.3

Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output, causing potential HTML injection and XSS if attacker-controlled content is returned from `transformError`. Version 5.53.5 fixes the issue.

Published 2026-02-26 · CVE record · OSV

Products: sveltejs svelte

Fixed upstream

EcosystemPackageFixed in
npmsvelte5.53.5