CVE-2026-34080: flatpak xdg-dbus-proxy
Vulnerability summary
CVE-2026-34080 is a medium (CVSS 6.8) vulnerability in flatpak xdg-dbus-proxy. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 07-04-2026PublishedVulnerability first disclosed.
- 21-04-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
6 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.8MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- NVDNIST6.8MediumCVSS: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
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
-0.01 pp
From 0.18% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse3 products
- xdg-dbus-proxy&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 0.1.5-150600.3.5.1
- xdg-dbus-proxy&distro=SUSE Linux Enterprise Server 16.0< 0.1.6-160000.3.1
- xdg-dbus-proxy&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 0.1.6-160000.3.1
Opensuse2 products
- xdg-dbus-proxy&distro=openSUSE Leap 16.0< 0.1.6-160000.3.1
- xdg-dbus-proxy&distro=openSUSE Tumbleweed< 0.1.7-1.1
Debian1 product
- xdg-dbus-proxy< 0.1.4-3+deb12u1 | < 0.1.6-1+deb13u1 | < 0.1.7-1
Flatpak1 product
- xdg-dbus-proxy< 0.1.7
Mageia1 product
- xdg-dbus-proxy< 0.1.7-1.mga9
Ubuntu1 product
- xdg-dbus-proxy< 0.1.2-1ubuntu0.1~esm1 | < 0.1.3-1ubuntu0.1 | < 0.1.5-1ubuntu0.2 | < 0.1.6-1ubuntu0.1
6 vendors · 9 products
References
15 links- github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-vjp5-hjfm-7677X Refsource CONFIRMAdvisoryREPORTVendor Advisory
- www.openwall.com/lists/oss-security/2026/04/10/15Third Party Advisory
