Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’…

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 16, 2026 · NIST NVD

   Detected

   Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

2. Oct 15, 2026 · NIST NVD

   Updated

   Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

Affected

• cpe mattermost/mattermost desktopversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-1046

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-1046

  30-day exploitation probability 0.3%

  first.org
• NIST NVDVulnerability recordCVE-2026-1046

  Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

  nvd.nist.gov

References

• Vendor Advisory · mattermost.com