A pki-core security update has been released for CentOS 7.

CESA-2021:0851 Important CentOS 7 pki-core Security Update

CentOS Errata and Security Advisory 2021:0851 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2021:0851

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

x86_64:
821164fdb3e807716631102ab1778e4736d70fc13bfc34bebdebe03bcfc8510f pki-base-10.5.18-12.el7_9.noarch.rpm
b97ca8437ca8ddd548433b4e5244b6b95c3c06fabebee6a67b64e0183ff83641 pki-base-java-10.5.18-12.el7_9.noarch.rpm
c799c7a9b990e36dedf9785fd1b300a75ffe77c3f8e0e9074d4279a3d1d85cd7 pki-ca-10.5.18-12.el7_9.noarch.rpm
86754c49d208af8b291d53143af752244a68d88e0b4ccbd4efb6811386339d4c pki-javadoc-10.5.18-12.el7_9.noarch.rpm
f5ed6de364527262c7c94c0a93639ae14e4a1137b79f84385dfd331a2a78b7f4 pki-kra-10.5.18-12.el7_9.noarch.rpm
c2282a789d3df8501b91543727d2c0b76e144991275bca82e8c75c83afbe05d7 pki-server-10.5.18-12.el7_9.noarch.rpm
d5f36384f01382169e35a68adc8feedd5a3f1bb1e38a45244efcf65320e8c633 pki-symkey-10.5.18-12.el7_9.x86_64.rpm
3518ffcaeb18d70ca1e7a98dfb39cdb789944a2791b29a154aa0a970188b0b33 pki-tools-10.5.18-12.el7_9.x86_64.rpm

Source:
680812694e7d6b680289c73882db571ef4630c2d3cbb06f0c7a9bd5f54b0788e pki-core-10.5.18-12.el7_9.src.rpm