A libxml2 security update has been released for CentOS 7.

CESA-2021:3810 Moderate CentOS 7 libxml2 Security Update

CentOS Errata and Security Advisory 2021:3810 Moderate

Upstream details at :   https://access.redhat.com/errata/RHSA-2021:3810

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

x86_64:
9c739eecd603856d78884d350c8dd6ede946fc361bbe142177f439da852cc952 libxml2-2.9.1-6.el7_9.6.i686.rpm
ffdb0e908ca8cc9013d59da38b6a5d9d04ea15e6af25a38508bc92e04af68500 libxml2-2.9.1-6.el7_9.6.x86_64.rpm
fffcdd496e8017e9a7bb4fdc0e4a0d7e1b98c54d5f9dabf43b01870bbb14d79e libxml2-devel-2.9.1-6.el7_9.6.i686.rpm
e5f363f81639b222cd478b35c882cd06eecb2b8e8876f3e80dd3d85c8a6198a2 libxml2-devel-2.9.1-6.el7_9.6.x86_64.rpm
0448f0190f604f767981ff4c96e3e9210bc3ec57cf905b9c65ce31bcbdb59db6 libxml2-python-2.9.1-6.el7_9.6.x86_64.rpm
84429c34c87f336378bdb26019944d56abac80c14e6c4ee130584e9a6b1042d3 libxml2-static-2.9.1-6.el7_9.6.i686.rpm
88425ec1660289732da5de1bf61433d763b6a1dd261bd1f618a21bbad1e482eb libxml2-static-2.9.1-6.el7_9.6.x86_64.rpm

Source:
77a185b7809e60150742e9329668a13ba82cd75f8cba0e7ce08da790ac17e5c6 libxml2-2.9.1-6.el7_9.6.src.rpm