{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "= 2.25.2"
                  },
                  {
                    "last_affected": "= 2.25.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              },
              {
                "range": [
                  {
                    "fixed": "ad92002966053309f83b550861e2ef04bc714744"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v2.25.3",
                "range": [
                  {
                    "fixed": "bbe007e52e8aeaa520b3e515235d467f5b1416e6"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "2706d7e858426ba856d9711b0e761b2fee7986c4"
            },
            {
              "fixed": "ad92002966053309f83b550861e2ef04bc714744"
            },
            {
              "fixed": "bbe007e52e8aeaa520b3e515235d467f5b1416e6"
            }
          ],
          "repo": "https://github.com/flavorjones/loofah",
          "type": "GIT"
        }
      ],
      "versions": [
        "= 2.25.2"
      ]
    }
  ],
  "aliases": [
    "GHSA-jcff-cj73-4w4f"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-184",
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126206.json"
  },
  "details": "Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. In 2.25.2, Loofah::HTML5::Scrub.allowed_uri? treats a data URI mediatype containing the HTML5 named solidus reference \u0026sol; as malformed and falls back to the allowed text/plain, while a browser decodes the reference and interprets the same value as text/html. An application that validates a user-controlled URL with this helper and renders the approved value in href or another browser-interpreted URI attribute can allow cross-site scripting. Rails::HTML::Sanitizer.allowed_uri? re-exports the affected helper. Loofah's default sanitize() path is not affected because Nokogiri decodes the entity before URI validation. This issue is fixed in version 2.25.3.",
  "id": "CVE-2026-126206",
  "modified": "2026-11-14T02:31:03.047935866Z",
  "published": "2026-11-12T20:51:36.537Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126206.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-jcff-cj73-4w4f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126206"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flavorjones/loofah/commit/ad92002966053309f83b550861e2ef04bc714744"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flavorjones/loofah/pull/324"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Loofah allowed_uri? treats data:text\u0026sol;html as safe text/plain"
}