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fkie_cve-2026-94422

An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail.

openSUSE-SU-2026:11913-1 — xdg-dbus-proxy-0.1.9-1.1 on GA media

xdg-dbus-proxy-0.1.9-1.1 on GA media

UBUNTU-CVE-2026-94422

Affected: Ubuntu:Pro:20.04:LTS: xdg-dbus-proxy, Ubuntu:22.04:LTS: xdg-dbus-proxy, Ubuntu:24.04:LTS: xdg-dbus-proxy, Ubuntu:26.04:LTS: xdg-dbus-proxy

security update