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

CentOS-announce: CESA-2020:1962 Important CentOS 6 python-twisted-web Security Update

CentOS Errata and Security Advisory 2020:1962 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2020:1962

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

i386:
e5325be26650ca5a0802a3b95cb74026f32994e65aa2bd47c8d2ee33f639012d python-twisted-web-8.2.0-6.el6_10.i686.rpm

x86_64:
d9ae88251c4f8c24ce973b48536a2a12fe5cc447f2fdf868255072bf0f444014 python-twisted-web-8.2.0-6.el6_10.x86_64.rpm

Source:
79f6182719d97f904c01fc56312ed76942e6a487e4d255854d8d8a4bcd07ec86 python-twisted-web-8.2.0-6.el6_10.src.rpm