Vulnerability in Gohugo 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 · last modified .
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
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-pmrv-x7gp-2rjw) (vendor-advisory, Vendor Advisory)
- VulnCheck Advisory: Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-100693?
- CVE-2026-100693 is a high-severity vulnerability in Gohugo 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.