CVE-2026-9602

Mattermost Desktop App vulnerable versions:

Mozilla: Out-of-bounds write with malformed IPC messages (MFSA 2018-07)

A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages. This can potentially allow for sandbox escape through memory corruption in the parent process. This vulnerability affects Thunderbird 52.7, Firefox ESR 52.7, and Firefox 59...