---
id: CVE-2026-97027
title: >-
  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
summary: >-
  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 th…
severity: low
cvss: 3.6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L'
cwe:
  - CWE-20
vendor: Red Hat
product: flatpak
affected:
  - flatpak (all versions)
  - flatpak (all versions)
  - flatpak (all versions)
  - flatpak (all versions)
published: '2026-09-28'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T21:29:07.663'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97027'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97027'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2542683'
    label: secalert@redhat.com
  - url: 'https://github.com/flatpak/flatpak/security/advisories/GHSA-v64f-hrwr-j4vh'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97027.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97027'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97027'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00126
epssPercentile: 0.02281
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-29T19:39:47.160409Z'
ingestedAt: '2026-09-28T21:20:54.788Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-28 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97027.json)