{"id":"UBUNTU-CVE-2026-73490","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.","modified":"2026-08-19T11:11:14Z","published":"2026-08-12T21:17:00Z","upstream":["CVE-2026-73490"],"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"}],"affected":[{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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":"2.0.3-2+deb9u3build0.16.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}},{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.3-2","2.2.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-loofah","binary_version":"2.2.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}},{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.3-1","2.3.1+dfsg-1","2.4.0+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-loofah","binary_version":"2.4.0+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}},{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.0-1","2.13.0-1","2.13.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.13.0-2","binary_name":"ruby-loofah"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}},{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.21.3-1","2.21.4-1","2.22.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-loofah","binary_version":"2.22.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}},{"package":{"name":"ruby-loofah","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ruby-loofah?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.24.1-1","2.25.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.25.0-1","binary_name":"ruby-loofah"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73490.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}