Cyber Resilience

CVE-2026-34080

Medium

Published: 07 April 2026

Published
07 April 2026
Modified
21 April 2026
KEV Added
—
Patch
—
CVSS Score v4 6.8 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0018 7.2th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-34080 is a medium-severity Improper Validation of Unsafe Equivalence in Input (CWE-1289) vulnerability in Flatpak Xdg-Dbus-Proxy. Its CVSS base score is 6.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Disable or Modify Tools (T1685); ranked at the 7.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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)…

more

and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.

CWE(s)
CWE-1289NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1685 Disable or Modify Tools Defense Impairment
Adversaries may disable, degrade, or tamper with security tools or applications (e.
attack.mitre.org →
Why these techniques?

Policy parser bypass directly impairs the D-Bus filtering proxy (defense tool), enabling unauthorized message interception.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

flatpak
xdg-dbus-proxy
≤ 0.1.7

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References