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5.3 Medium

CVE-2026-27902 Svelte performance oriented web framework

Description

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.

Affected products and versions

Product Affected versions Fixed in
svelte 5.53 5.53.0 → < 5.53.5 5.53.5

References

Timeline

  1. Published
  2. Last modified

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