Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100693Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
High 8.4
In plain English
A high-severity security flaw in hugo from gohugoio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.1%top 96.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | hugo | 0.166.0-1 | DEBIAN-CVE-2026-100693 |
| Ubuntu:22.04:LTS | hugo | no fix listed | UBUNTU-CVE-2026-100693 |
| Ubuntu:26.04:LTS | hugo | no fix listed | UBUNTU-CVE-2026-100693 |
| Ubuntu:26.10 | hugo | no fix listed | UBUNTU-CVE-2026-100693 |
Affected products (as reported)
Weakness: CWE-178 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-pmrv-x7gp-2rjw) vendor-advisory
- VulnCheck Advisory: Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass third-party-advisory