A libksba security update has been released for CentOS 7.

CESA-2022:7088 Important CentOS 7 libksba Security Update

CentOS Errata and Security Advisory 2022:7088 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2022:7088

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

x86_64:
1a363c8575a8323b1e1cbafa08ba87655572c3b032a755bcf5cf957927fb9a70 libksba-1.3.0-6.el7_9.i686.rpm
02d7a80b905c4425a04fb580f2e9cedea180c37a12f4aebcc804d768f6a12ffd libksba-1.3.0-6.el7_9.x86_64.rpm
46064f76c45b401ff1197bbdcd32585b704afcef86d2dad3fb76250749b3ef7d libksba-devel-1.3.0-6.el7_9.i686.rpm
ee580eaecadcceeb9560a23a48c376d9c012f5fee8623d0f10419c273b744065 libksba-devel-1.3.0-6.el7_9.x86_64.rpm

Source:
13e9ed62a802079314aaed24266e53f9a623084ca4c4fa400f37696189e6a08c libksba-1.3.0-6.el7_9.src.rpm