flatpak xdg-dbus-proxy up to 0.1.6 improper validation of unsafe equivalence in input

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in flatpak xdg-dbus-proxy up to 0.1.6 and classified as problematic. This affects an unknown part. Such manipulation leads to improper validation of unsafe equivalence in input. This vulnerability is referenced as CVE-2026-34080. The attack can only be performed from a local environment. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in flatpak xdg-dbus-proxy up to 0.1.6. It has been rated as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a improper validation of unsafe equivalence in input vulnerability. Using CWE to declare the problem leads to CWE-1289. The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-34080 since 03/25/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 307902 (Debian dla-4542 : xdg-dbus-proxy - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.1.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (307902). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of unsafe equivalence in input
CWE: CWE-1289 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 307902
Nessus Name: Debian dla-4542 : xdg-dbus-proxy - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: xdg-dbus-proxy 0.1.7

Timelineinfo

03/25/2026 CVE reserved
04/07/2026 +12 days Advisory disclosed
04/07/2026 +0 days VulDB entry created
04/21/2026 +14 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-vjp5-hjfm-7677
Status: Confirmed

CVE: CVE-2026-34080 (🔒)
GCVE (CVE): GCVE-0-2026-34080
GCVE (VulDB): GCVE-100-355940

Entryinfo

Created: 04/07/2026 23:29
Updated: 04/21/2026 20:03
Changes: 04/07/2026 23:29 (67), 04/21/2026 20:03 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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