A python-imaging security update has been released for CentOS 6.

CentOS Errata and Security Advisory 2020:0898 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2020:0898

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

i386:
e5e487f4a64c9775bcdae9d3c02d1e3718a1fc432d4b061c25a7354c0e74a42e python-imaging-1.1.6-20.el6_10.i686.rpm
4c8bfb642e1b8f5d789dd953d715a5c439186686224a4b9b117fecf99f925992 python-imaging-devel-1.1.6-20.el6_10.i686.rpm
99ccfb7c2d63d391403a78ec8064c31d2fc37a9fce7dee0a95987b36ff461525 python-imaging-sane-1.1.6-20.el6_10.i686.rpm
377a9eeb9d3db4f3b8dae5556f98c4130199d6c1e33c647c76b5c378d4668d9d python-imaging-tk-1.1.6-20.el6_10.i686.rpm

x86_64:
e40e8540892e6ec87316e52fc6b94967f65cad16104f1f76a8f6c0baf5c2b23c python-imaging-1.1.6-20.el6_10.x86_64.rpm
5ae199f4fc91e7ce954b54856cb680fcfa5c14bcc05d2f5ea3a4f3591f41e443 python-imaging-devel-1.1.6-20.el6_10.x86_64.rpm
4a3517ae79b91c8c7f519398bf1823b77083fc56443ce8f6c58f743bedf28f55 python-imaging-sane-1.1.6-20.el6_10.x86_64.rpm
bca03ae0c427a1c2a309ebd3002aa3b169e494259f629c7058063fe08639564c python-imaging-tk-1.1.6-20.el6_10.x86_64.rpm

Source:
b007e0a0f3dbb762199ce21d3cc857103cc1ab05e20343ef2699d66e0f983471 python-imaging-1.1.6-20.el6_10.src.rpm