Vulnerability Details CVE-2026-75587
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.2%
CVSS Severity
CVSS v3 Score 3.6
References