{"schema_version":"1.7.2","id":"OESA-2026-4098","modified":"2026-09-25T01:28:23Z","published":"2026-09-25T01:28:23Z","upstream":["CVE-2026-90616"],"summary":"flatpak security update","details":"flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information.\r\n\r\nSecurity Fix(es):\n\nIn Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host, which can be escalated to arbitrary code execution on the host, a different vulnerability than CVE-2026-76925. Flatpak creates a few app data directories (e.g., /var/cache, /var/data, /var/config, and /var/tmp) in every sandbox on every app launch where, in some cases, components of the path are attacker-controlled. Missing symlink protection can redirect the directories. Some of these directories are bind-mounted by Flatpak by passing the path (e.g., /home/user/.var/app/APP_ID/cache/tmp), which contains attacker-controlled directories (tmp) to bwrap --bind SRC DST. bwrap passes the path on to the kernel, which then follows symlinks. A malicious symlink can point to arbitrary locations on the host and it will become mounted inside the sandbox.(CVE-2026-90616)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"flatpak","purl":"pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.2-13.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["flatpak-1.10.2-13.oe2403sp4.aarch64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp4.aarch64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp4.aarch64.rpm","flatpak-devel-1.10.2-13.oe2403sp4.aarch64.rpm"],"noarch":["flatpak-help-1.10.2-13.oe2403sp4.noarch.rpm"],"src":["flatpak-1.10.2-13.oe2403sp4.src.rpm"],"x86_64":["flatpak-1.10.2-13.oe2403sp4.x86_64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp4.x86_64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp4.x86_64.rpm","flatpak-devel-1.10.2-13.oe2403sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"flatpak","purl":"pkg:rpm/openEuler/flatpak&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-16.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["flatpak-1.0.3-16.oe2003sp4.aarch64.rpm","flatpak-debuginfo-1.0.3-16.oe2003sp4.aarch64.rpm","flatpak-debugsource-1.0.3-16.oe2003sp4.aarch64.rpm","flatpak-devel-1.0.3-16.oe2003sp4.aarch64.rpm"],"noarch":["flatpak-help-1.0.3-16.oe2003sp4.noarch.rpm"],"src":["flatpak-1.0.3-16.oe2003sp4.src.rpm"],"x86_64":["flatpak-1.0.3-16.oe2003sp4.x86_64.rpm","flatpak-debuginfo-1.0.3-16.oe2003sp4.x86_64.rpm","flatpak-debugsource-1.0.3-16.oe2003sp4.x86_64.rpm","flatpak-devel-1.0.3-16.oe2003sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"flatpak","purl":"pkg:rpm/openEuler/flatpak&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.2-13.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["flatpak-1.10.2-13.oe2203sp4.aarch64.rpm","flatpak-debuginfo-1.10.2-13.oe2203sp4.aarch64.rpm","flatpak-debugsource-1.10.2-13.oe2203sp4.aarch64.rpm","flatpak-devel-1.10.2-13.oe2203sp4.aarch64.rpm"],"noarch":["flatpak-help-1.10.2-13.oe2203sp4.noarch.rpm"],"src":["flatpak-1.10.2-13.oe2203sp4.src.rpm"],"x86_64":["flatpak-1.10.2-13.oe2203sp4.x86_64.rpm","flatpak-debuginfo-1.10.2-13.oe2203sp4.x86_64.rpm","flatpak-debugsource-1.10.2-13.oe2203sp4.x86_64.rpm","flatpak-devel-1.10.2-13.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"flatpak","purl":"pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.2-13.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["flatpak-1.10.2-13.oe2403sp1.aarch64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp1.aarch64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp1.aarch64.rpm","flatpak-devel-1.10.2-13.oe2403sp1.aarch64.rpm"],"noarch":["flatpak-help-1.10.2-13.oe2403sp1.noarch.rpm"],"src":["flatpak-1.10.2-13.oe2403sp1.src.rpm"],"x86_64":["flatpak-1.10.2-13.oe2403sp1.x86_64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp1.x86_64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp1.x86_64.rpm","flatpak-devel-1.10.2-13.oe2403sp1.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"flatpak","purl":"pkg:rpm/openEuler/flatpak&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.2-13.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["flatpak-1.10.2-13.oe2403sp3.aarch64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp3.aarch64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp3.aarch64.rpm","flatpak-devel-1.10.2-13.oe2403sp3.aarch64.rpm"],"noarch":["flatpak-help-1.10.2-13.oe2403sp3.noarch.rpm"],"src":["flatpak-1.10.2-13.oe2403sp3.src.rpm"],"x86_64":["flatpak-1.10.2-13.oe2403sp3.x86_64.rpm","flatpak-debuginfo-1.10.2-13.oe2403sp3.x86_64.rpm","flatpak-debugsource-1.10.2-13.oe2403sp3.x86_64.rpm","flatpak-devel-1.10.2-13.oe2403sp3.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4098"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90616"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"High"}}