Description
Mattermost Desktop App versions <=6.2 6.2.2.0 fail to redact the pre-auth secret when generating a diagnostics report, which allows a local attacker with access to a user's diagnostics report or log files to obtain the plaintext pre-auth secret configured for a connected server via inspecting the Server Connectivity (Step-3) diagnostics output. Mattermost Advisory ID: MMSA-2026-00716
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | ≤ 6.2.2 | 6.3.0 |
Advisories 1
- WID-SEC-2026-2876 Mattermost Desktop: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
References
- MMSA-2026-00716 vendor-advisory