CVE-2026-100693CWE-178

CVE-2026-100693

High · published September 26, 2026

CVSS v3.1
8.4
EPSS
0%
Percentile
3.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.4 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00139 · 3.0th percentile
Weakness
CWE-178 · Improper Handling of Case Sensitivity
Published
2026-09-26T18:16Z
Affected products (1)
ProductVersionsFixed in
gohugo/hugo≥ 0.162.0, < 0.166.00.166.0
References (2)
https://github.com/gohugoio/hugo/security/advisories/GHSA-pmrv-x7gp-2rjw · [email protected]https://www.vulncheck.com/advisories/hugo-0.162.0-before-0.166.0-ip-literal-deny-rule-bypass · [email protected]
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:23Z
    Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
    cvelistv5