{"id":"CVE-2026-73490","summary":"Loofah: SVG `href` attribute bypasses local-reference restriction","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.","aliases":["GHSA-9wjq-cp2p-hrgf"],"modified":"2026-08-15T11:31:28.643950021Z","published":"2026-08-12T20:58:12.219Z","related":["CGA-xv77-wgmr-q2qf"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73490.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/flavorjones/loofah","events":[{"introduced":"0"},{"fixed":"20867b9be689521887364b74822c41ef830523c9"},{"fixed":"2706d7e858426ba856d9711b0e761b2fee7986c4"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.25.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.25.1","v2.25.0","v2.24.1","v2.24.0","v2.23.1","v2.23.0","v2.22.0","v2.21.4","v2.21.3","v2.21.2","v2.21.1","v2.21.0","v2.21.0.rc1","v2.20.0","v2.19.0","v2.18.0","v2.17.0","v2.16.0","v2.15.0","v2.14.0","v2.13.0","v2.12.0","v2.11.0","v2.10.0","v2.9.1","v2.9.0","v2.8.0","v2.7.0","v2.6.0","v2.5.0","v2.4.0","v2.3.1","v2.3.0","v2.2.2","v2.2.1","v2.2.0","v2.1.1","v2.1.0","v2.1.0.rc2","v2.1.0.rc1","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.2.1","v1.2.0","v1.1.0","v1.0.0","v1.0.0.beta.1","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.2","v0.2.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/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"}]}