A thunderbird security update has been released for CentOS 7.

CESA-2022:5480 Important CentOS 7 thunderbird Security Update

CentOS Errata and Security Advisory 2022:5480 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2022:5480

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
097675babe2d377b7544507d5d63c4df6766f7bfa3508a1288be59444b79ef19 thunderbird-91.11.0-2.el7.centos.x86_64.rpm

Source:
26cafcebd660201321c6cfdf9b374c3fb54e8a8547b6bc7dffea1fcd3c78e67f thunderbird-91.11.0-2.el7.centos.src.rpm