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[USN-8167-2] xdg-dbus-proxy vulnerability

Posted on 26 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8167-2
May 26, 2026

xdg-dbus-proxy vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

xdg-dbus-proxy could be made to expose sensitive information.

Software Description:
- xdg-dbus-proxy: A filtering proxy for D-Bus connections

Details:

USN-8167-1 fixed a vulnerability in xdg-dbus-proxy. This update
provides the corresponding update for Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that xdg-dbus-proxy incorrectly handled eavesdropping
in policy rules. A local attacker could possibly use this issue to
intercept certain D-Bus messages.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS
xdg-dbus-proxy 0.1.2-1ubuntu0.1~esm1
Available with Ubuntu Pro

After a standard system update you need to restart your session to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8167-2
https://ubuntu.com/security/notices/USN-8167-1
CVE-2026-34080

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