{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.25.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20867b9be689521887364b74822c41ef830523c9"
            },
            {
              "fixed": "2706d7e858426ba856d9711b0e761b2fee7986c4"
            }
          ],
          "repo": "https://github.com/flavorjones/loofah",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9wjq-cp2p-hrgf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73490.json"
  },
  "details": "Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.",
  "id": "CVE-2026-73490",
  "modified": "2026-08-15T11:31:28.643950021Z",
  "published": "2026-08-12T20:58:12.219Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73490.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73490"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flavorjones/loofah/pull/308"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Loofah: SVG `href` attribute bypasses local-reference restriction"
}