{"id":"DEBIAN-CVE-2026-34078","details":"Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.","modified":"2026-09-14T17:03:09.030344156Z","published":"2026-04-07T22:16:21.930Z","upstream":["CVE-2026-34078"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-34078"}],"affected":[{"package":{"name":"flatpak","ecosystem":"Debian:12","purl":"pkg:deb/debian/flatpak?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.10-1~deb12u2"}]}],"versions":["1.14.10-1~deb12u1","1.14.4-1","1.14.4-1+deb12u1","1.14.4-1+deb12u1~bpo11+1","1.14.4-2","1.14.5-1","1.14.6-1","1.14.6-1~deb13u1","1.14.8-1","1.14.8-1~deb12u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34078.json"}},{"package":{"name":"flatpak","ecosystem":"Debian:13","purl":"pkg:deb/debian/flatpak?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.6-1~deb13u1"}]}],"versions":["1.16.1-1","1.16.1-2","1.16.1-3","1.16.2-1","1.16.2-1~deb13u1","1.16.3-1","1.16.3-1~deb13u1","1.16.4-1","1.16.4-2","1.16.5-1","1.16.6-1~deb13u1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34078.json"}},{"package":{"name":"flatpak","ecosystem":"Debian:14","purl":"pkg:deb/debian/flatpak?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.4-1"}]}],"versions":["1.16.1-1","1.16.1-2","1.16.1-3","1.16.2-1","1.16.2-1~deb13u1","1.16.3-1","1.16.3-1~deb13u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34078.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}]}