A tigervnc bugfix update has been released for CentOS 7.

CentOS-announce: CEBA-2020:5005 CentOS 7 tigervnc BugFix Update

CentOS Errata and Bugfix Advisory 2020:5005

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:5005

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

x86_64:
2949f6a1f906f0892e15a8ee8c20f69ae5d4957c01b49b14336b97a39682d8d2 tigervnc-1.8.0-22.el7.x86_64.rpm
e1197686e2dde2402bf2c97fffaafc2a53e90a49b640a6fa6272c09b15d1bcb7 tigervnc-icons-1.8.0-22.el7.noarch.rpm
1a53c3292a73f1254003ddafa161c57842ace3830adbe515eebac0b44ee7d99a tigervnc-license-1.8.0-22.el7.noarch.rpm
8a45d170c2b696356237faac6e20f84a8fe83b9b0d0990de4c51df8c043ae548 tigervnc-server-1.8.0-22.el7.x86_64.rpm
55a90d093b44adee52d01531fa0e512335d53d71c5d5b988d4bc903982900cd6 tigervnc-server-applet-1.8.0-22.el7.noarch.rpm
5f044c5e59d547e3073ad6d5da425845c091f6e24a072716c7f61b3ecc5688b6 tigervnc-server-minimal-1.8.0-22.el7.x86_64.rpm
bccabcae0cba84cc84cbbe98ef845532c6d35b342a05aa650c421cfcecc269ac tigervnc-server-module-1.8.0-22.el7.x86_64.rpm

Source:
b4dffee95f77fd81914116130290240bdd190ce80c61e107c8340cf952fbb156 tigervnc-1.8.0-22.el7.src.rpm