CVE-2026-34080
Policy Parser Bypass in xdg-dbus-proxy Enables Message Eavesdropping
Publication date: 2026-04-07
Last updated on: 2026-04-21
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| flatpak | xdg-dbus-proxy | to 0.1.7 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1289 | The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability exists in xdg-dbus-proxy, a filtering proxy for D-Bus connections. Before version 0.1.7, there was a flaw in the policy parser that allowed bypassing eavesdrop restrictions. Specifically, the proxy checks for the exact string 'eavesdrop=true' in policy rules but fails to correctly handle cases where there is a space before the equals sign, such as 'eavesdrop = 'true''. This flaw enables clients to intercept D-Bus messages they should not have access to.
This vulnerability was fixed in version 0.1.7 of xdg-dbus-proxy.
How can this vulnerability impact me? :
This vulnerability can allow unauthorized clients to intercept D-Bus messages that they are not supposed to access. This means sensitive inter-process communication data could be exposed to unauthorized parties, potentially leading to information disclosure or other security risks depending on the nature of the intercepted messages.
What immediate steps should I take to mitigate this vulnerability?
The vulnerability is fixed in xdg-dbus-proxy version 0.1.7. Immediate mitigation involves upgrading xdg-dbus-proxy to version 0.1.7 or later.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in xdg-dbus-proxy allows clients to bypass eavesdrop restrictions and intercept D-Bus messages they should not have access to.
This unauthorized interception of messages could potentially lead to exposure of sensitive information, which may impact compliance with data protection standards and regulations such as GDPR and HIPAA.
However, specific impacts on compliance are not detailed in the provided information.