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Date: Tue, 7 Apr 2026 21:09:26 +0100
From: Simon McVittie <smcv@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: CVE-2026-34080: Eavesdrop filter bypass allows message interception
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Package: xdg-dbus-proxy
Version: 0.1.0-1
Severity: grave
Tags: security
Justification: user security hole
X-Debbugs-Cc: Debian Security Team <team@security.debian.org>
Control: fixed -1 0.1.7-1
Forwarded: https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-vjp5-hjfm-7677

xdg-dbus-proxy older than 0.1.7 does not detect all legacy eavesdropping 
match rules. A malicious or compromised Flatpak app could use this to 
spy on D-Bus message bus traffic that the app was not meant to be able 
to see.

For testing/unstable, this is fixed in xdg-dbus-proxy 0.1.7.

For trixie or older, we'll need a backport of upstream commit 
<https://github.com/flatpak/xdg-dbus-proxy/commit/4d0d1d74d4f40260a79161163b4b2f7276bce0b0>, 
or a backport of the full 0.1.7 upstream release (which seems to be 
bugfix-only).

    smcv
]