{"id":"UBUNTU-CVE-2026-121627","details":"buku 5.0 through 5.1.1 contains a stored cross-site scripting vulnerability in the bukuserver bookmark list that allows attackers to execute script via an unescaped bookmark URL in BookmarkModelView._list_entry(). Attackers can submit a URL containing a double quote and event handler through the unauthenticated /api/bookmarks endpoint to issue same-origin API requests with viewers' credentials.","modified":"2026-11-05T11:46:32.137973046Z","published":"2026-11-03T18:17:00Z","upstream":["CVE-2026-121627"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-121627"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-121627"},{"type":"REPORT","url":"https://github.com/jarun/buku"},{"type":"REPORT","url":"https://github.com/jarun/buku/blob/v5.1.1/bukuserver/views.py#L133"},{"type":"REPORT","url":"https://github.com/jarun/buku/issues/911"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/buku-5.0-through-5.1.1-stored-xss-via-bukuserver-bookmark-list-url"}],"affected":[{"package":{"name":"buku","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/buku?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.4.0-1","3.5.0-1","3.6-1","3.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"3.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}},{"package":{"name":"buku","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/buku?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.2+ds-1","4.2.2+ds-2","4.3+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"4.3+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}},{"package":{"name":"buku","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/buku?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"4.6+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}},{"package":{"name":"buku","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/buku?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"4.8+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}},{"package":{"name":"buku","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/buku?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0+ds-1","5.1.1+ds-2"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"5.1.1+ds-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}},{"package":{"name":"buku","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/buku?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9+ds-1","5.0+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"buku","binary_version":"5.0+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121627.json"}}],"schema_version":"1.9.2","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_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}