{"id":"CVE-2026-100693","title":"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","summary":"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.GetRe…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-178","CWE-918"],"vendor":"gohugo","product":"hugo","affected":["hugo >= 0.162.0, < 0.166.0"],"patched":["hugo 0.166.0"],"published":"2026-09-26","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:18:01.750","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100693","references":[{"url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-pmrv-x7gp-2rjw","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/hugo-0.162.0-before-0.166.0-ip-literal-deny-rule-bypass","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100693.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100693"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541830"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100693"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100693"},{"url":"https://access.redhat.com/errata/RHSA-2026:66266"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00139,"epssPercentile":0.03234,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-30T17:05:19.378001Z"},"scores":{"nvd":8.4,"vendor":4,"cna":8.4},"ingestedAt":"2026-09-26T13:33:20.904Z","slug":"CVE-2026-100693","body":"## Overview\n\nHugo 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.\n\n## Affected\n\n- `hugo >= 0.162.0, < 0.166.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `hugo 0.166.0`\n\n## Vendor advisories\n\n- **RHSA-2026:66266** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:66266)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}