VULNERABILITY INTELLIGENCE

CVE-2026-34078

CVSS score10 CRITICAL
EPSS probability1.68%
CISA KEVNot currently listed
Published2026-04-07
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-61
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-59

Primary references