An icedtea-web bugfix update has been released for CentOS 7.

CentOS-announce: CEBA-2020:5460 CentOS 7 icedtea-web BugFix Update

CentOS Errata and Bugfix Advisory 2020:5460

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:5460

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

x86_64:
78d39bca758e7f5e4b5122c075cbb2a2c1d8ab9c258b4f91f4744f9ff29a5e8d icedtea-web-1.7.1-4.el7_9.x86_64.rpm
32a6e9291813e4daadd971db10a8925ff8233160eb5a5a4fb45d5590f18f2893 icedtea-web-devel-1.7.1-4.el7_9.noarch.rpm
d4c752f14b919fcec87f8f21c7401dc7c9b2ceb39af9d43b03be700c06316653 icedtea-web-javadoc-1.7.1-4.el7_9.noarch.rpm

Source:
33b776a35467354354cadba5fd70b635498a3c52bd4794cc1c5801bc0b5168d9 icedtea-web-1.7.1-4.el7_9.src.rpm