{"id":"CVE-2026-94422","revision":"2bba3d2562954eefafacf7fd14097651","records":[{"revision":"2bba3d2562954eefafacf7fd14097651","observedAt":"2026-10-24T04:48:20.602+00:00","statement":{"source":"cve-program","id":"CVE-2026-94422","aliases":[],"title":"xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape","description":"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.","state":0,"publishedAt":"2026-10-02T13:54:10.589+00:00","modifiedAt":"2026-10-24T03:08:12.584+00:00","affected":[{"ecosystem":"https://github.com/flatpak/xdg-dbus-proxy","name":"xdg-dbus-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"packageName\": \"xdg-dbus-proxy\",\n                    \"collectionURL\": \"https://github.com/flatpak/xdg-dbus-proxy\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"0.1.9\",\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy","name":"xdg-dbus-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Fedora\",\n                    \"product\": \"Fedora\",\n                    \"packageName\": \"xdg-dbus-proxy\",\n                    \"collectionURL\": \"https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"0.1.9\",\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://access.redhat.com/downloads/content/package-browser/","name":"xdg-dbus-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Red Hat\",\n                    \"product\": \"Red Hat Enterprise Linux 9\",\n                    \"packageName\": \"xdg-dbus-proxy\",\n                    \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\",\n                    \"defaultStatus\": \"affected\",\n                    \"cpes\": [\n                        \"cpe:/o:redhat:enterprise_linux:9\"\n                    ]\n                }"},{"ecosystem":"https://access.redhat.com/downloads/content/package-browser/","name":"xdg-dbus-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Red Hat\",\n                    \"product\": \"Red Hat Enterprise Linux 10\",\n                    \"packageName\": \"xdg-dbus-proxy\",\n                    \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\",\n                    \"defaultStatus\": \"affected\",\n                    \"cpes\": [\n                        \"cpe:/o:redhat:enterprise_linux:10\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"},{"system":"CVSS 4.0","vector":"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","score":8.7,"severity":"HIGH"}],"references":["https://access.redhat.com/security/cve/CVE-2026-94422","https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq","https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400","https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e","https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3","https://bugzilla.redhat.com/show_bug.cgi?id=2542235"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-94422","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-94422","identifiers":["CVE-2026-94422"]},"retained":false,"historicalAffected":[]}],"coverage":[]}