RLSA-2026:90523: Important: xdg-dbus-proxy security update

Q: What access does an attacker need to exploit this issue?

The listed CVSS vector indicates the issue is reachable over a network, requires low attack complexity, and does not require privileges. However, user interaction is required for exploitation.

Q: What is the potential impact if exploitation succeeds?

Successful exploitation can result in a sandbox escape through a message-filtering bypass. The advisory rates the impact as high for confidentiality, integrity, and availability.

Q: Which component should be prioritized for remediation?

Prioritize systems using xdg-dbus-proxy, particularly where it filters D-Bus connections for sandboxed applications or is used outside its original Flatpak context.

Published Oct 29, 2026

Updated

xdg-dbus-proxy is a filtering proxy for D-Bus connections. It was originally part of the flatpak project, but it has been broken out as a standalone module to facilitate using it in other contexts.

Security Fix(es):

xdg-dbus-proxy: xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape (CVE-2026-94422)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

1 affected componentFixes available

rocky-linux/xdg-dbus-proxy<0:0.1.5-4.el10_2.1

0:0.1.5-4.el10_2.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade rocky-linux/xdg-dbus-proxy to a version that resolves this vulnerability.
Fixed in 0:0.1.5-4.el10_2.1

Event History

Oct 29, 2026

Advisory Published

via OSV·12:08 PM

Data Sourced

via OSV·12:08 PM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-94422

Frequently Asked Questions

What access does an attacker need to exploit this issue?

The listed CVSS vector indicates the issue is reachable over a network, requires low attack complexity, and does not require privileges. However, user interaction is required for exploitation.

What is the potential impact if exploitation succeeds?

Successful exploitation can result in a sandbox escape through a message-filtering bypass. The advisory rates the impact as high for confidentiality, integrity, and availability.

Which component should be prioritized for remediation?

Prioritize systems using xdg-dbus-proxy, particularly where it filters D-Bus connections for sandboxed applications or is used outside its original Flatpak context.

RLSA-2026:90523: Important: xdg-dbus-proxy security update

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

What access does an attacker need to exploit this issue?

What is the potential impact if exploitation succeeds?

Which component should be prioritized for remediation?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to exploit this issue?

What is the potential impact if exploitation succeeds?

Which component should be prioritized for remediation?