A denial of service via regular expression in the py.path.svnwc component of py (aka python-py) through 1.9.0 could be used by attackers to cause a compute-time denial of service attack by supplying malicious input to the blame functionality.
Created python-py tracking bugs for this issue:
Affects: fedora-all [bug 1906453]
Upstream fixed version is not released yet, but the patch is already merged with master branch:
In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP python-py package.