UBUNTU-CVE-2026-73490 (CVE-2026-73490)

Vulnerability from osv_ubuntu – Published: 2026-08-12 21:17 – Updated: 2026-08-19 11:11 – Source website
VLAI
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.

Severity
4.7 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.0.3-2+deb9u3build0.16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.0.3-2+deb9u3build0.16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.2-1",
        "2.0.3-1",
        "2.0.3-2",
        "2.0.3-2+deb9u1build0.16.04.1",
        "2.0.3-2+deb9u2build0.16.04.1",
        "2.0.3-2+deb9u3build0.16.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.2.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.2.2-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-2",
        "2.2.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.4.0+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.4.0+dfsg-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.3-1",
        "2.3.1+dfsg-1",
        "2.4.0+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.13.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.13.0-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.0-1",
        "2.13.0-1",
        "2.13.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.22.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.22.0-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.21.3-1",
        "2.21.4-1",
        "2.22.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-loofah",
            "binary_version": "2.25.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "ruby-loofah",
        "purl": "pkg:deb/ubuntu/ruby-loofah@2.25.0-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.24.1-1",
        "2.25.0-1"
      ]
    }
  ],
  "aliases": [],
  "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\u0027s 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\u0027s default allowlist are affected. This issue is fixed in version 2.25.2.",
  "id": "UBUNTU-CVE-2026-73490",
  "modified": "2026-08-19T11:11:14Z",
  "published": "2026-08-12T21:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-73490"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-73490"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/flavorjones/loofah/pull/308"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-73490"
  ]
}



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