vulnerability Multiples vulnérabilités dans Mattermost Desktop App (18 août 2026) Multiple vulnerabilities have been discovered in the Mattermost Desktop App, potentially allowing an attacker to compromise data confidentiality and a security issue not specified by the vendor. Users of versions prior to 6.2.3 should immediately update to the latest version to address these security concerns. CERT-FR · Aug 18, 2026 Medium CVE-2026-75587mattermostvulnerabilitydesktop app