---
id: CVE-2026-92162
title: >-
  Flatpak vulnerable to path traversal via unvalidated "arch" parameter in
  DeployAppstream
summary: >-
  Flatpak is a system for building, distributing, and running sandboxed desktop
  applications on Linux. Prior to version 1.18.1, on systems where at least one
  OCI remote is configured (most common on Fedora systems), a malicious local
  user …
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: flatpak
product: flatpak
affected:
  - flatpak < 1.18.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-20T15:31:59.509901Z'
exploitAvailable: true
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:32:18.640Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-92162'
references:
  - url: 'https://github.com/flatpak/flatpak/security/advisories/GHSA-v2gw-v9h5-9q4x'
    label: 'https://github.com/flatpak/flatpak/security/advisories/GHSA-v2gw-v9h5-9q4x'
  - url: 'https://github.com/flatpak/flatpak/pull/6768'
    label: 'https://github.com/flatpak/flatpak/pull/6768'
  - url: >-
      https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279
    label: >-
      https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279
  - url: >-
      https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92
    label: >-
      https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92
  - url: >-
      https://github.com/flatpak/flatpak/commit/aeb369a2723506fabc1f701ef7a0dc6c97c4b983
    label: >-
      https://github.com/flatpak/flatpak/commit/aeb369a2723506fabc1f701ef7a0dc6c97c4b983
tags:
  - cve.org
  - exploit-available
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/0xSemizzz/CVE-2026-92162'
  checkedAt: '2026-10-20T16:11:27.065Z'
ingestedAt: '2026-10-20T15:09:24.118Z'
---

## Overview

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Prior to version 1.18.1, on systems where at least one OCI remote is configured (most common on Fedora systems), a malicious local user in an active local session could use a crafted architecture name to trick the `flatpak-system-helper` process into creating a root-owned directory tree with contents determined by the OCI remote, plus a root-owned `lock` file and `icons` directory, outside the intended root directory. If this vulnerability is combined with other vulnerabilities also fixed in 1.18.1, the combination can lead to local root privilege escalation. This particular vulnerability is not believed to be exploitable if there are no OCI remotes configured (common on non-Fedora systems). Version 1.18.1 patches the issue.

## Affected

- `flatpak < 1.18.1`

## Remediation

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