Bug 2456273 (CVE-2026-34080)

Summary: CVE-2026-34080 xdg-dbus-proxy: xdg-dbus-proxy: Information disclosure due to policy parser vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in xdg-dbus-proxy, a filtering proxy for D-Bus connections. A local client can exploit a policy parser vulnerability by crafting specific policy rules, such as including a space before the equals sign in "eavesdrop=true". This improper parsing allows the client to bypass intended eavesdrop restrictions. The consequence is information disclosure, where clients can intercept D-Bus messages that should otherwise be inaccessible.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2456381, 2456382    
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Description OSIDB Bzimport 2026-04-07 22:01:22 UTC 
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.