UBUNTU-CVE-2026-94422

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Source
https://ubuntu.com/security/CVE-2026-94422
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94422.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-94422
Upstream
Published
2026-10-02T14:17:00Z
Modified
2026-10-08T12:55:04Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:20.04:LTS / xdg-dbus-proxy

Package

Name
xdg-dbus-proxy
Purl
pkg:deb/ubuntu/xdg-dbus-proxy?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.1.1-1
0.1.2-1
0.1.2-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "xdg-dbus-proxy",
            "binary_version":  "0.1.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "xdg-dbus-proxy-tests",
            "binary_version":  "0.1.2-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94422.json"

Ubuntu:22.04:LTS / xdg-dbus-proxy

Package

Name
xdg-dbus-proxy
Purl
pkg:deb/ubuntu/xdg-dbus-proxy?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.1.2-2build1
0.1.3-1
0.1.3-1ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "xdg-dbus-proxy",
            "binary_version":  "0.1.3-1ubuntu0.1"
        },
        {
            "binary_name":  "xdg-dbus-proxy-tests",
            "binary_version":  "0.1.3-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94422.json"

Ubuntu:24.04:LTS / xdg-dbus-proxy

Package

Name
xdg-dbus-proxy
Purl
pkg:deb/ubuntu/xdg-dbus-proxy?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.1.5-1
0.1.5-1build1
0.1.5-1build2
0.1.5-1ubuntu0.1
0.1.5-1ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "xdg-dbus-proxy",
            "binary_version":  "0.1.5-1ubuntu0.2"
        },
        {
            "binary_name":  "xdg-dbus-proxy-tests",
            "binary_version":  "0.1.5-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94422.json"

Ubuntu:26.04:LTS / xdg-dbus-proxy

Package

Name
xdg-dbus-proxy
Purl
pkg:deb/ubuntu/xdg-dbus-proxy?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.1.6-1
0.1.6-2
0.1.7-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "xdg-dbus-proxy",
            "binary_version":  "0.1.7-1"
        },
        {
            "binary_name":  "xdg-dbus-proxy-tests",
            "binary_version":  "0.1.7-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94422.json"