CVE-2026-75025

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

  • Published Sep 16, 2026
  • CVSS 4.7 medium
  • 0.2% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-75025 at the National Vulnerability Database