Security Vulnerabilities fixed in Thunderbird 102.6 — Mozilla

A missing check related to tex units could have led to a use-after-free and potentially exploitable crash.
An attacker who compromised a content process could have partially escaped the sandbox to read arbitrary files via clipboard-related IPC messages.This bug only affects Thunderbird for Linux. Other operating systems are unaffected.
An optimization in WebGL was incorrect in some cases, and could have led to memory corruption and a potentially exploitable crash.
The executable file warning was not presented when downloading .atloc and .ftploc files, which can run commands on a user’s computer. Note: This issue only affected Mac OS operating systems. Other operating systems are unaffected.
A use-after-free in WebGL extensions could have led to a potentially exploitable crash.
Mozilla developers Randell Jesup, Valentin Gosu, Olli Pettay, and the Mozilla Fuzzing Team reported memory safety bugs present in Thunderbird 102.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.