Vulnerability in Gohugoio Hugo
CVE-2026-100693
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.
Published .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/gohugoio/hugo/security/advisories/GHSA-pmrv-x7gp-2rjw (vendor-advisory)
- www.vulncheck.com/advisories/hugo-0.162.0-before-0.166.0-ip-literal-deny-rule-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100693?
- CVE-2026-100693 is a high-severity vulnerability in Gohugoio Hugo, classified under Improper Handling of Case Sensitivity. CVSS score: 8.4/10. Published 2026-09-26.
- How severe is CVE-2026-100693?
- High severity. CVSS v3 base score is 8.4 out of 10.