CVE-2026-100693: Gohugo Hugo

High severity, CVSS 8.4. EPSS: 0.1% chance of exploitation in the next 30 days.

Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.

Affected products

• Gohugo Hugo: from 0.162.0, before 0.166.0 (fixed in 0.166.0)

Published 2026-09-26. Last modified 2026-09-30.