CVE-2026-27902 — Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers
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 p…
Published: 2026-02-26 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7