All vulnerabilities
CVE-2026-100693GHSA-pmrv-x7gp-2rjw

Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass

gohugoio hugo
Open in ThreatlineRecord JSON
CVSS
8.6High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.14%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.166.0Fixed versionCVE List
Published26 Sep 2026Updated 30 Sep 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • hugoaffected: 0.162.0 before 0.166.0CVE List
  • hugounaffected: 0.166.0CVE List

References 2