CVE-2026-34080: CWE-1289: Improper Validation of Unsafe Equivalence in Input in flatpak xdg-dbus-proxy
xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.
AI Analysis
Technical Summary
The xdg-dbus-proxy component of flatpak, which filters D-Bus connections, contains a policy parser vulnerability in versions before 0.1.7. The proxy attempts to enforce eavesdrop restrictions by checking for 'eavesdrop=true' in policy rules but does not handle cases where there is a space before the equals sign, such as 'eavesdrop ='true''. This improper validation (CWE-1289) allows clients to bypass intended restrictions and intercept D-Bus messages they should not have access to. The vulnerability is addressed by correcting the policy parser in flatpak xdg-dbus-proxy version 0.1.7.
Potential Impact
Clients using vulnerable versions of xdg-dbus-proxy can bypass eavesdrop restrictions and intercept D-Bus messages that should be protected, potentially exposing sensitive inter-process communication data. The vulnerability does not require user interaction and has low attack complexity but requires local access with low privileges. There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade flatpak xdg-dbus-proxy to version 0.1.7 or later where this vulnerability is fixed. Since the vendor advisory confirms the fix in 0.1.7, applying this official update is the recommended remediation. No other mitigation or temporary workaround is indicated.
CVE-2026-34080: CWE-1289: Improper Validation of Unsafe Equivalence in Input in flatpak xdg-dbus-proxy
Description
xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The xdg-dbus-proxy component of flatpak, which filters D-Bus connections, contains a policy parser vulnerability in versions before 0.1.7. The proxy attempts to enforce eavesdrop restrictions by checking for 'eavesdrop=true' in policy rules but does not handle cases where there is a space before the equals sign, such as 'eavesdrop ='true''. This improper validation (CWE-1289) allows clients to bypass intended restrictions and intercept D-Bus messages they should not have access to. The vulnerability is addressed by correcting the policy parser in flatpak xdg-dbus-proxy version 0.1.7.
Potential Impact
Clients using vulnerable versions of xdg-dbus-proxy can bypass eavesdrop restrictions and intercept D-Bus messages that should be protected, potentially exposing sensitive inter-process communication data. The vulnerability does not require user interaction and has low attack complexity but requires local access with low privileges. There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade flatpak xdg-dbus-proxy to version 0.1.7 or later where this vulnerability is fixed. Since the vendor advisory confirms the fix in 0.1.7, applying this official update is the recommended remediation. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-25T16:21:40.868Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5743aaaed68159a661743
Added to database: 4/7/2026, 9:16:42 PM
Last enriched: 4/22/2026, 10:54:08 PM
Last updated: 5/21/2026, 9:32:03 PM
Views: 54
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