A glib2 security update has been released for CentOS 7.

CESA-2021:2147 Important CentOS 7 glib2 Security Update

CentOS Errata and Security Advisory 2021:2147 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2021:2147

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

x86_64:
497230bf98b04ad42a5e86190210020c9d693a673e748256dfdae01fda278f6b glib2-2.56.1-9.el7_9.i686.rpm
8509fe4641cb16b24f3aced3e8cb56ef28648055b03221b4d4cb4017259e1995 glib2-2.56.1-9.el7_9.x86_64.rpm
e10f54c5d580e560b5d4611357d17fabf744c685d0597c57f65096c26149632c glib2-devel-2.56.1-9.el7_9.i686.rpm
0506a69ed5099abb05188f0ad253ebf7fb23f9516de5789b336622a000b67e9d glib2-devel-2.56.1-9.el7_9.x86_64.rpm
3c79cb3de74e545373941c507295276cafff95e505438c0bb771fd73deb0cf11 glib2-doc-2.56.1-9.el7_9.noarch.rpm
b65a283b2abdd24d3efe7491ad9fbe6bab445307ebf30070af80a0fd335b8560 glib2-fam-2.56.1-9.el7_9.x86_64.rpm
45fefc5e38fdda8877b262c158dcf1558ddd8b48fca3c2cd58b21d90e637096f glib2-static-2.56.1-9.el7_9.i686.rpm
79588570ccbd1df263463cf10a5d97ef323266e2abedfeb2fefafd34609a08df glib2-static-2.56.1-9.el7_9.x86_64.rpm
1f62ae8c12fed4f7639f910b2b5ff758d169ec26fdf5536df0cfd5d6bee2d247 glib2-tests-2.56.1-9.el7_9.x86_64.rpm

Source:
634ef9804a476dc5460688ee7f962df1e2759598a66b2ec2a3b40f7bb55ac774 glib2-2.56.1-9.el7_9.src.rpm