A thunderbird security update has been released for CentOS 7.

CESA-2022:1725 Important CentOS 7 thunderbird Security Update

CentOS Errata and Security Advisory 2022:1725 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2022:1725

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

x86_64:
b8af2291b240e6adee1241ffbbc596bcb08dc54cfa7eec97883a3840e21871ca thunderbird-91.9.0-3.el7.centos.x86_64.rpm

Source:
8d5d32ee00324acfa7303d98f2333f45ad43564fb103442ca293cb864dd810d9 thunderbird-91.9.0-3.el7.centos.src.rpm