CVE-2026-1046

Arbitrary application execution via unvalidated server-controlled URLs in Help menu

CVSS 7.6 HIGHEPSS 0.2%CWE-939

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L

Produtos afetados

Mattermost · Mattermost

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Referências

https://mattermost.com/security-updates