No unit, relevant e2e or dependecy tests are currently being run in the oauth-proxy repository. That should change.
The next PR in line https://github.com/openshift/oauth-proxy/pull/148 probably won't merge till 4.7, moving to the next release.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.7.0 security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:5633