{"schemaVersion":3,"id":"CVE-2026-34078","aliases":["UBUNTU-CVE-2026-34078","DEBIAN-CVE-2026-34078"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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