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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade flatpak-develUpgrade flatpak-selinuxUpgrade flatpak-libsUpgrade flatpak-session-helperUpgrade flatpak | May 31, 2026 | May 28, 2026 |
| Alpine Linux | — | Upgrade flatpak | Apr 9, 2026 | Apr 7, 2026 |
| Amazon Linux Ami 2 | — | Upgrade flatpak-libsUpgrade flatpakUpgrade flatpak-debuginfoUpgrade flatpak-develUpgrade flatpak-builder | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade flatpak-debugsourceUpgrade flatpakUpgrade flatpak-session-helper-debuginfoUpgrade flatpak-testsUpgrade flatpak-libsUpgrade flatpak-libs-debuginfoUpgrade flatpak-session-helperUpgrade flatpak-tests-debuginfoUpgrade flatpak-develUpgrade flatpak-selinuxUpgrade flatpak-debuginfo | May 4, 2026 | Apr 7, 2026 |
| Debian | — | Upgrade flatpak | Apr 23, 2026 | Apr 23, 2026 |
| Gentoo Linux | — | Upgrade sys-apps/flatpak. | Aug 16, 2026 | Aug 14, 2026 |
| Oracle_linux | — | Upgrade flatpakUpgrade flatpak-libsUpgrade flatpak-session-helperUpgrade flatpak-selinuxUpgrade flatpak-devel | Jun 1, 2026 | Apr 7, 2026 |
| Redhat_linux | — | Upgrade flatpak-tests-debuginfoUpgrade flatpak-session-helper-debuginfoUpgrade flatpak-libsUpgrade flatpak-debuginfoUpgrade flatpakUpgrade flatpak-session-helperUpgrade flatpak-develUpgrade flatpak-debugsourceUpgrade flatpak-builderUpgrade flatpak-selinuxUpgrade flatpak-libs-debuginfo | Jun 3, 2026 | Apr 7, 2026 |
| Rocky_linux | — | Upgrade flatpakUpgrade flatpak-libs-debuginfoUpgrade flatpak-session-helperUpgrade flatpak-develUpgrade flatpak-debugsourceUpgrade flatpak-session-helper-debuginfoUpgrade flatpak-debuginfoUpgrade flatpak-libs | Jun 1, 2026 | May 29, 2026 |
| Ubuntu | — | Upgrade libflatpak0 (Ubuntu Pro)Upgrade flatpak (Ubuntu Pro) | Sep 14, 2026 | Sep 10, 2026 |
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