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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-34078

Flatpak has a complete sandbox escape leading to host file access and code execution in the host context

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

flatpak flatpak

  • < 1.16.4affected

References