https://www.thunderbird.net/en-US/thunderbird/102.9.1/releasenotes/
https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird102.9.1 未更新
追記
たこすけ さん お知らせありがとうございます
Security Vulnerabilities fixed in Thunderbird 102.9.1 - Mozilla Foundation Security Advisory 2023-12
追記終わり