A libksba security update has been released for CentOS 7.

CESA-2023:0530 Important CentOS 7 libksba Security Update

CentOS Errata and Security Advisory 2023:0530 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2023:0530

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

x86_64:
09f2614aeded0a8d1f7454f0270fe81a129ba048470ed9851001049d758c2a0f libksba-1.3.0-7.el7_9.i686.rpm
b93825bf103f570b5e1032748e404b0d685f2025279cdfd1efbd0506671dd269 libksba-1.3.0-7.el7_9.x86_64.rpm
d66f8f50f89a80ba6132ad39773812f3a9b5d598db35a63de6e8465c3c7137d8 libksba-devel-1.3.0-7.el7_9.i686.rpm
082abb4e91620918c0d5d1da8dfb191f950c793d112a4ac3ec4f2055ca594c68 libksba-devel-1.3.0-7.el7_9.x86_64.rpm

Source:
3e26e87673f1bf593161fedcff13c52a5f4cd7708824d3d04c4a43b955749c98 libksba-1.3.0-7.el7_9.src.rpm