CVE-2026-34080 PUBLISHED

xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception

Assigner: GitHub_M
Reserved: 25.03.2026 Published: 07.04.2026 Updated: 08.04.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 6.8

Product Status

Vendor flatpak
Product xdg-dbus-proxy
Versions
  • Version < 0.1.7 is affected

References

Problem Types

  • CWE-1289: Improper Validation of Unsafe Equivalence in Input CWE