{"id":"USN-8741-1","summary":"flatpak vulnerabilities","details":"It was discovered that Flatpak did not properly validate paths in\nsandbox-expose options. A malicious or compromised Flatpak app could\nuse app-controlled symlinks to access arbitrary host files and gain\ncode execution in the host context. This issue was addressed in Ubuntu\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-34078) \n\nIt was discovered that Flatpak did not properly validate paths when   \nremoving outdated ld.so cache files. A malicious or compromised Flatpak\napp could use this issue to delete arbitrary files on the host. \n(CVE-2026-34079)","modified":"2026-09-10T16:42:30.390320742Z","published":"2026-09-10T08:44:18Z","related":["UBUNTU-CVE-2026-34078","UBUNTU-CVE-2026-34079"],"upstream":["CVE-2026-34078","CVE-2026-34079","UBUNTU-CVE-2026-34078","UBUNTU-CVE-2026-34079"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8741-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34078"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34079"}],"affected":[{"package":{"name":"flatpak","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.9-0ubuntu0.4+esm1"}]}],"versions":["0.8.7-5","0.10.0-1","0.10.0-2","0.10.1-1","0.10.2-1","0.10.2.1-1","0.10.2.1-2","0.10.3-1","0.11.1-0ubuntu1","0.11.3-2","0.11.3-3","0.11.7-0ubuntu0.1","1.0.1-0ubuntu0.1","1.0.6-0ubuntu0.1","1.0.7-0ubuntu0.18.04.1","1.0.8-0ubuntu0.18.04.1","1.0.9-0ubuntu0.1","1.0.9-0ubuntu0.2","1.0.9-0ubuntu0.3","1.0.9-0ubuntu0.4"],"ecosystem_specific":{"binaries":[{"binary_name":"flatpak","binary_version":"1.0.9-0ubuntu0.4+esm1"},{"binary_name":"flatpak-tests","binary_version":"1.0.9-0ubuntu0.4+esm1"},{"binary_version":"1.0.9-0ubuntu0.4+esm1","binary_name":"gir1.2-flatpak-1.0"},{"binary_version":"1.0.9-0ubuntu0.4+esm1","binary_name":"libflatpak0"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-34079","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8741-1.json"}},{"package":{"name":"flatpak","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.5-0ubuntu0.5+esm1"}]}],"versions":["1.4.3-1","1.6.0-1","1.6.1-1","1.6.2-1","1.6.3-1","1.6.5-0ubuntu0.1","1.6.5-0ubuntu0.2","1.6.5-0ubuntu0.3","1.6.5-0ubuntu0.4","1.6.5-0ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.5-0ubuntu0.5+esm1","binary_name":"flatpak"},{"binary_version":"1.6.5-0ubuntu0.5+esm1","binary_name":"flatpak-tests"},{"binary_name":"gir1.2-flatpak-1.0","binary_version":"1.6.5-0ubuntu0.5+esm1"},{"binary_name":"libflatpak0","binary_version":"1.6.5-0ubuntu0.5+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2026-34078","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-34079","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8741-1.json"}},{"package":{"name":"flatpak","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12.7-1ubuntu0.1+esm1"}]}],"versions":["1.10.2-3","1.12.2-1","1.12.2-2","1.12.3-1","1.12.4-1","1.12.5-1","1.12.6-1","1.12.7-1","1.12.7-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"flatpak","binary_version":"1.12.7-1ubuntu0.1+esm1"},{"binary_version":"1.12.7-1ubuntu0.1+esm1","binary_name":"flatpak-tests"},{"binary_version":"1.12.7-1ubuntu0.1+esm1","binary_name":"gir1.2-flatpak-1.0"},{"binary_name":"libflatpak0","binary_version":"1.12.7-1ubuntu0.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:22.04:LTS","cves":[{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-34078"},{"id":"CVE-2026-34079","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8741-1.json"}},{"package":{"name":"flatpak","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.6-1ubuntu0.1+esm1"}]}],"versions":["1.14.4-2","1.14.5-1","1.14.5-1build1","1.14.5-1build4","1.14.5-1build5","1.14.5-1build6","1.14.6-1","1.14.6-1ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"1.14.6-1ubuntu0.1+esm1","binary_name":"flatpak"},{"binary_version":"1.14.6-1ubuntu0.1+esm1","binary_name":"flatpak-tests"},{"binary_name":"gir1.2-flatpak-1.0","binary_version":"1.14.6-1ubuntu0.1+esm1"},{"binary_name":"libflatpak0","binary_version":"1.14.6-1ubuntu0.1+esm1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-34078"},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-34079"}],"ecosystem":"Ubuntu:Pro:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8741-1.json"}}],"schema_version":"1.9.0"}