[SECURITY] [DSA 6510-1] xdg-dbus-proxy security update
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Debian Security Advisory DSA-6510-1 security@debian.org
https://www.debian.org/security/ Alberto Garcia
September 23, 2026 https://www.debian.org/security/faq
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Package : xdg-dbus-proxy
CVE ID : CVE-2026-94422
Debian Bug : 1148782
It was discovered that an incorrect implementation of message
filtering in xdg-dbus-proxy 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 achieve arbitrary code
execution outside its sandbox.
If other app frameworks rely on xdg-dbus-proxy in the same way that
Flatpak does, then they will have an equivalent vulnerability until
xdg-dbus-proxy is updated.
For the stable distribution (trixie), this problem has been fixed in
version 0.1.6-1+deb13u3.
We recommend that you upgrade your xdg-dbus-proxy packages.
For the detailed security status of xdg-dbus-proxy please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/xdg-dbus-proxy
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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