CVE-2018-6560: Flatpak

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used to break out of the sandbox, because whitespace handling in the proxy is not identical to whitespace handling in the daemon.

Affected products

• Flatpak Flatpak: before 0.8.9 (fixed in 0.8.9); from 0.9.1, up to and including 0.9.99; from 0.10.0, before 0.10.3 (fixed in 0.10.3)
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2018-02-02. Last modified 2026-06-17.