Input validation error in Flatpak - CVE-2026-97027
Published: September 28, 2026
Vulnerability identifier: #VU152571
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97027
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper validation of exported vendor-extension keys in Flatpak's Desktop Entry and D-Bus Service file export handling when exporting application metadata. A local user can include arbitrary keys in exported Desktop Entry or D-Bus Service files to cause a denial of service.
Affected software
Flatpak
How to mitigate CVE-2026-97027
Install security update from vendor's website.
Flatpak - update to 1.18.4