CVE-2026-34078 | 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.
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.
- 🔗 github.com/flatpak/flatpak/security/advisories/GHSA-…
- 🔗 www.openwall.com/lists/oss-security/2026/04/09/8
- 🔗 www.openwall.com/lists/oss-security/2026/04/10/14
- 🔗 access.redhat.com/errata/RHSA-2026:21755
- 🔗 access.redhat.com/errata/RHSA-2026:21756
- 🔗 access.redhat.com/errata/RHSA-2026:21757
- 🔗 access.redhat.com/errata/RHSA-2026:23417
- 🔗 access.redhat.com/errata/RHSA-2026:23418
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CVE-2026-34078 | 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.
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 r