{"id":"UBUNTU-CVE-2026-49978","details":"DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside \u003ctemplate\u003e.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.","modified":"2026-07-24T15:44:03.668932631Z","published":"2026-07-14T21:17:00Z","upstream":["CVE-2026-49978"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49978"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-49978"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify/releases/tag/3.4.7"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq"}],"affected":[{"package":{"name":"dompurify.js","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dompurify.js?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.3~dfsg1-1","0.7.3~dfsg1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-dompurify","binary_version":"0.7.3~dfsg1-2"},{"binary_name":"node-dompurify","binary_version":"0.7.3~dfsg1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49978.json"}},{"package":{"name":"dompurify.js","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/dompurify.js?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.0~dfsg1-1","0.9.0~dfsg1-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.0~dfsg1-2","binary_name":"libjs-dompurify"},{"binary_name":"node-dompurify","binary_version":"0.9.0~dfsg1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49978.json"}},{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-dompurify?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_name":"node-dompurify","binary_version":"2.3.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49978.json"}},{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-dompurify?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_name":"node-dompurify","binary_version":"3.0.9+dfsg+~3.0.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49978.json"}},{"package":{"name":"node-dompurify","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-dompurify?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.7+dfsg+~3.0.5-2","3.3.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-dompurify","binary_version":"3.3.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49978.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA: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":"Ubuntu","score":"medium"}]}