CVE-2026-58402: Gohugo Hugo

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out of the attribute and injects a live script element. This issue is fixed in 0.163.3.

Affected products

• Gohugo Hugo: from 0.60.0, before 0.163.3 (fixed in 0.163.3)

Published 2026-07-06. Last modified 2026-07-08.