{"id":"CVE-2026-94422","published":"2026-10-02T14:17:12.003","lastModified":"2026-10-02T18:44:11.270","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.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-290"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-94422","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542235","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/23/5","tags":[]}],"exploitRefs":[{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e","tags":[]},{"url":"https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw in xdg-dbus-proxy versions before 0.1.9 allows attackers to bypass message filtering on the D-Bus session bus, leading to potential arbitrary code execution outside the sandbox.","exploitability":"Exploitation is moderately difficult as it requires setting a reply serial number on non-reply messages, which is not a common occurrence.","blast_radius":"If exploited, this flaw could lead to arbitrary code execution, potentially compromising the entire system outside the sandboxed environment.","remediation":"Upgrade to xdg-dbus-proxy 0.1.9 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","dbus","sandbox","flatpak"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-03T08:53:45.688Z"}}