CVE-2026-34080— xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception
Quick assessment
Affected
flatpak xdg-dbus-proxy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
xdg-dbus-proxy是Flatpak开源的一个D-Bus连接过滤代理。 xdg-dbus-proxy 0.1.7之前版本存在安全漏洞，该漏洞源于策略解析器未能正确处理带空格的eavesdrop属性，可能导致绕过窃听限制。
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I. Basic Information for CVE-2026-34080
Vulnerability Information
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Vulnerability Title
xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1289
Source: CVE Program / CVE List V5
Vulnerability Title
xdg-dbus-proxy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xdg-dbus-proxy是Flatpak开源的一个D-Bus连接过滤代理。 xdg-dbus-proxy 0.1.7之前版本存在安全漏洞，该漏洞源于策略解析器未能正确处理带空格的eavesdrop属性，可能导致绕过窃听限制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| flatpak | xdg-dbus-proxy | < 0.1.7 | - |
|
II. Public POCs for CVE-2026-34080
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · flatpak · 2026-04-07 · 3 CVEs total
| CVE-2026-34079 | Flatpak affected by arbitrary file deletion on the host filesystem | |
| CVE-2026-34078 | Flatpak has a complete sandbox escape leading to host file access and code execution in th |
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V. Comments for CVE-2026-34080
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