CVE-2026-34078
Published:April 07, 2026
Updated:April 20, 2026
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 Packages
https://github.com/flatpak/flatpak.git (GITHUB):
Affected version(s) >=1.17.0 <1.17.4Fix Suggestion:
Update to version 1.17.4https://github.com/flatpak/flatpak.git (GITHUB):
Affected version(s) >=0.1 <1.16.4Fix Suggestion:
Update to version 1.16.4Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
UNIX Symbolic Link (Symlink) Following
EPSS
Base Score:
0.18
