{"id":"UBUNTU-CVE-2026-65898","details":"DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.","modified":"2026-07-29T10:19:00.353081478Z","published":"2026-07-23T14:18:00Z","upstream":["CVE-2026-65898"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-65898"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-65898"},{"type":"REPORT","url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-cmwh-pvxp-8882"}],"affected":[{"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_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-2026-65898.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_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-2026-65898.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_version":"3.3.3+dfsg-1","binary_name":"node-dompurify"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65898.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}