Report: CVE-2026-34078 - Flatpak has a complete sandbox escape leading to host file access and code execu
CVE ID :CVE-2026-34078 Published : April 7, 2026, 10:16 p.m. | 1 hour, 47 minutes ago 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. This vulnerability is fixed in 1.16.4. Severity: 9.3 | CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...