CVE-2026-34078

CriticalCVSS 10.0/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-61 CWE-59

Affected software

No affected versions have been published.

Timeline

Published: Apr 7, 2026
Last modified: Jul 24, 2026
NVD status: Modified

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