Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit.

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6524-1 flatpak security update
Fixes

Solution

No solution given by the vendor.


Workaround

Only install applications from trusted sources.

History

Mon, 28 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit.
Title Flatpak: flatpak: denial of service via unsanitized keys in exported desktop entry / d-bus service files
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-20
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 3.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-28T20:57:06.758Z

Reserved: 2026-09-23T21:12:57.647Z

Link: CVE-2026-97027

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-28T21:17:20.067

Modified: 2026-09-28T21:17:20.067

Link: CVE-2026-97027

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses