CVE catalog
CVE-2026-94422
xdg-dbus-proxy: CVE-2026-94422
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.50% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | xdg-dbus-proxy | sid | 0.1.9-1 | fixed |
| Debian | xdg-dbus-proxy | forky | 0.1.9-1 | fixed |
| Debian | xdg-dbus-proxy | trixie | 0.1.6-1+deb13u2 | vulnerable |
| Debian | xdg-dbus-proxy | trixie-security | 0.1.6-1+deb13u3 | fixed |
| Debian | xdg-dbus-proxy | bookworm | 0.1.4-3+deb12u1 | vulnerable |
| Debian | xdg-dbus-proxy | bookworm-security | 0.1.4-3+deb12u2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | xdg-dbus-proxy | source | sid | 0.1.9-1 | not yet assigned | Not reported | [1148782] |
| Debian | xdg-dbus-proxy | source | forky | 0.1.9-1 | not yet assigned | Not reported | [1148782] |
| Debian | xdg-dbus-proxy | source | trixie | 0.1.6-1+deb13u3 | not yet assigned | Not reported | [1148782] |
| Debian | xdg-dbus-proxy | source | bookworm | 0.1.4-3+deb12u2 | not yet assigned | Not reported | [1148782] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [xdg-dbus-proxy]Affected
Details (4)
0.1.4-3+deb12u1· amd64 · bookwormAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· arm64 · bookwormAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
- [xdg-dbus-proxy-tests]Affected
Source package: [xdg-dbus-proxy]
Details (4)
0.1.4-3+deb12u1· amd64 · bookwormAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· arm64 · bookwormAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· amd64 · bookworm-securityAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
0.1.4-3+deb12u1· arm64 · bookworm-securityAffected · Fixed:
0.1.4-3+deb12u2dsa · xdg-dbus-proxy · debian · bookworm; dsa · xdg-dbus-proxy · debian · 12
[Debian 13 (Trixie)]
- [xdg-dbus-proxy]Affected
Details (6)
0.1.6-1+deb13u1· amd64 · trixieAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u1· arm64 · trixieAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u2· amd64 · trixie-security · Historical versionAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u2· arm64 · trixie-securityAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
- [xdg-dbus-proxy-tests]Affected
Source package: [xdg-dbus-proxy]
Details (6)
0.1.6-1+deb13u1· amd64 · trixieAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u1· arm64 · trixieAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u2· amd64 · trixie-security · Historical versionAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u2· arm64 · trixie-securityAffected · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
0.1.6-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
0.1.6-1+deb13u3dsa · xdg-dbus-proxy · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/09/23/5]
- [https://access.redhat.com/security/cve/CVE-2026-94422]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2542235]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11913-1.json]
- [https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3]
- [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/security/advisories/GHSA-2cgv-pwcq-wvpq]
- [https://lists.debian.org/debian-lts-announce/2026/10/msg00050.html]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-94422]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-94422]
- [https://security-tracker.debian.org/tracker/CVE-2026-94422]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94422.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]