A thunderbird security update has been released for CentOS 7.

CESA-2022:0538 Important CentOS 7 thunderbird Security Update

CentOS Errata and Security Advisory 2022:0538 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2022:0538

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

x86_64:
079057e8ac08393331b2846ec1d9b56021f2e524cf0eb682c033f6348fcf31da thunderbird-91.6.0-1.el7.centos.x86_64.rpm

Source:
ee9bff2aee73a32e7702cea2165d16c19b7a3ca80a02be27af7e00b4630006c7 thunderbird-91.6.0-1.el7.centos.src.rpm