{"id":"DEBIAN-CVE-2026-94422","details":"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.","modified":"2026-10-03T05:00:29.824311642Z","published":"2026-10-02T14:17:12.003Z","upstream":["CVE-2026-94422"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-94422"}],"affected":[{"package":{"name":"xdg-dbus-proxy","ecosystem":"Debian:12","purl":"pkg:deb/debian/xdg-dbus-proxy?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.4-3","0.1.4-3+deb12u1","0.1.5-1","0.1.6-1","0.1.6-2","0.1.7-1","0.1.8-1","0.1.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94422.json"}},{"package":{"name":"xdg-dbus-proxy","ecosystem":"Debian:13","purl":"pkg:deb/debian/xdg-dbus-proxy?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.1.6-1+deb13u3"}]}],"versions":["0.1.6-1","0.1.6-1+deb13u1","0.1.6-1+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94422.json"}},{"package":{"name":"xdg-dbus-proxy","ecosystem":"Debian:14","purl":"pkg:deb/debian/xdg-dbus-proxy?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.1.9-1"}]}],"versions":["0.1.6-1","0.1.6-2","0.1.7-1","0.1.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94422.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}