What’s Vulnerable › Vulnerabilities

CVE-2026-34080: xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-07 · updated 2026-07-24
• Weakness: CWE-1289

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.

Affected products

• flatpak xdg-dbus-proxy: before 0.1.7 — fixed in 0.1.7

How to fix

Upgrade to a fixed version: flatpak xdg-dbus-proxy 0.1.7. Check the vendor advisory for mitigations.

References

• https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-vjp5-hjfm-7677
• http://www.openwall.com/lists/oss-security/2026/04/10/15
• https://lists.debian.org/debian-lts-announce/2026/04/msg00022.html

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