{"id":"UBUNTU-CVE-2026-74859","details":"The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives without validating archive member paths. As a result, a crafted theme archive can write files outside ~/.themes by using ../ path traversal, absolute paths, or symlink entries.","modified":"2026-09-16T14:01:57.339904617Z","published":"2026-09-08T09:18:00Z","upstream":["CVE-2026-74859"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-74859"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-74859"}],"affected":[{"package":{"name":"gnome-tweaks","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.27.4-1ubuntu1","3.27.90.2-1ubuntu1","3.27.92-1ubuntu1","3.28.0-1","3.28.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.28.1-1","binary_name":"gnome-tweak-tool"},{"binary_version":"3.28.1-1","binary_name":"gnome-tweaks"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"}},{"package":{"name":"gnome-tweaks","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.34.0-2","3.34.0-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"gnome-tweak-tool","binary_version":"3.34.0-2ubuntu1"},{"binary_name":"gnome-tweaks","binary_version":"3.34.0-2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"}},{"package":{"name":"gnome-tweaks","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["40.0-3","40.0-4","40.0-5","40.0-6","42~beta-1","42~beta-1ubuntu1","42~beta-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"42~beta-1ubuntu2","binary_name":"gnome-tweaks"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"}},{"package":{"name":"gnome-tweaks","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42~beta-4","45.1-1","46~beta-1","46~beta-2","46.0-1","46.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"gnome-tweaks","binary_version":"46.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"}},{"package":{"name":"gnome-tweaks","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/gnome-tweaks?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["46.1-1","49.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"49.0-1","binary_name":"gnome-tweaks"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-74859.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}