---
id: CVE-2026-75025
title: >-
  Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost
  Desktop did not sufficiently restrict server-rendered content from accessing
  local or private network resources
summary: >-
  Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost
  Desktop did not sufficiently restrict server-rendered content from accessing
  local or private network resources. Thanks to game0v3r for contributing to
  this im…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N'
cwe:
  - CWE-346
vendor: Mattermost
product: Mattermost
affected:
  - Mattermost <= 6.2.2
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T19:16:57.850'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75025'
references:
  - url: 'https://mattermost.com/security-updates'
    label: responsibledisclosure@mattermost.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T18:34:41.889353Z'
ingestedAt: '2026-09-16T19:02:30.736Z'
epss: 0.00155
epssPercentile: 0.03942
---

## Overview

Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost Desktop did not sufficiently restrict server-rendered content from accessing local or private network resources. Thanks to game0v3r for contributing to this improvement under the Mattermost responsible disclosure policy. Mattermost Advisory ID: MMSA-2026-00698

## Remediation

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