{"id":"UBUNTU-CVE-2026-0540","details":"DOMPurify 3.1.3 through 3.3.1 and 2.5.3 through 2.5.8, fixed in commit 2726c74, contain a cross-site scripting vulnerability that allows attackers to bypass attribute sanitization by exploiting five missing rawtext elements (noscript, xmp, noembed, noframes, iframe) in the SAFE_FOR_XML regex. Attackers can include payloads like \u003c/noscript\u003e\u003cimg src=x onerror=alert(1)\u003e in attribute values to execute JavaScript when sanitized output is placed inside these unprotected rawtext contexts.","modified":"2026-04-02T21:07:09.189305Z","published":"2026-03-03T18:16:00Z","upstream":["CVE-2026-0540"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0540"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-0540"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify/commit/fca0a938b4261ddc9c0293a289935a9029c049f5"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml"}],"affected":[{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-dompurify@2.3.3+dfsg-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.0+dfsg-2","2.3.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.3+dfsg-1","binary_name":"node-dompurify"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0540.json"}},{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-dompurify@3.0.9+dfsg+~3.0.5-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.1+dfsg+~2.4.0-1","3.0.9+dfsg+~3.0.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.9+dfsg+~3.0.5-1","binary_name":"node-dompurify"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0540.json"}},{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-dompurify@3.1.7+dfsg+~3.0.5-2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.7+dfsg+~3.0.5-1","3.1.7+dfsg+~3.0.5-2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.7+dfsg+~3.0.5-2","binary_name":"node-dompurify"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0540.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}