FKIE_CVE-2026-73490

Vulnerability from fkie_nvd - Published: 2026-08-12 21:17 - Updated: 2026-09-09 20:58
Severity
4.7 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9
security-advisories@github.comhttps://github.com/flavorjones/loofah/pull/308
security-advisories@github.comhttps://github.com/flavorjones/loofah/releases/tag/v2.25.2
security-advisories@github.comhttps://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "loofah",
          "vendor": "flavorjones",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.25.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-73490",
  "lastModified": "2026-09-09T20:58:37.713",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73490",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-13T13:01:37.604672Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-12T21:17:42.127",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flavorjones/loofah/pull/308"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flavorjones/loofah/releases/tag/v2.25.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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