Hugo before 0.166.0 Cross-Site Scripting via text/org

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100694",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-26T13:23:52.256Z",
    "dateReserved": "2026-09-26T02:37:41.037Z",
    "datePublished": "2026-09-26T13:23:52.256Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-26T13:23:52.256Z"
      },
      "datePublic": "2026-09-09T00:00:00.000Z",
      "title": "Hugo before 0.166.0 Cross-Site Scripting via text/org",
      "descriptions": [
        {
          "lang": "en",
          "value": "Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*']."
        }
      ],
      "affected": [
        {
          "vendor": "gohugoio",
          "product": "hugo",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.56.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "0.166.0"
            },
            {
              "version": "0.166.0",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "cweId": "CWE-79",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-pq74-mj4h-cjq2",
          "name": "GitHub Security Advisory (GHSA-pq74-mj4h-cjq2)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/hugo-before-0.166.0-cross-site-scripting-via-text-org",
          "name": "VulnCheck Advisory: Hugo before 0.166.0 Cross-Site Scripting via text/org",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "REQUIRED",
            "scope": "CHANGED",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "philipdissert",
          "type": "finder"
        }
      ]
    }
  }
}